Gavrilo Princip and the Sarajevo Assassination That Triggered World War One

 

In Sarajevo on Sunday 28 June 1914, the city was alive with celebration. Marching bands filled the air with music and the black-and-yellow banners of the Habsburg Empire fluttered alongside Bosnia’s red and gold. Police patrolled the bridges as the regal motorcade rolled past, crowds jostling for a glimpse of Archduke Franz Ferdinand and his wife Sophie. But not every Bosnian was there to cheer. Among the onlookers, a gaunt 19-year-old student waited, his fingers curled around a Browning pistol concealed in his pocket. Like a deadly game of dominos, his next action would trigger a series of consequences that would topple empires and ignite the bloodiest war Europe had ever seen.

Decades later, historian A.J.P. Taylor would call him:

‘The man who changed the course of history with a single act.’

Some see him as a hero, others as a villain, but the truth is more complex and is rarely told in full outside the Balkans. In the West, he is often reduced to a paragraph in school textbooks as a young killer who stumbled into history by inadvertently starting a war. His name was Gavrilo Princip.

 

 

Gavrilo Princip’s Early Life

Family and Childhood in Obljaj

Gavrilo Princip’s humble beginnings gave no hint that he would one day become one of the most divisive figures in the Austro-Hungarian Empire. He was born on 13 July 1894, on the earthen floor of his family’s one-room cottage. His mother, Marija, gave birth beside the open hearth they used for cooking, and with no doctors or midwives, many children in rural Bosnia were not expected to survive. But Gavrilo did. The family would have celebrated his arrival inside that dim, smoke-filled room, gathered on rough stone benches, the only light trickling in through a hole above the fire. They lived in the tiny village of Obljaj in the green and rocky Grahovo Valley, surrounded by the Dinara mountains on Bosnia’s remote western edge. To the north and west lay Croatia, and to the east, the independent state of Serbia, whose people and ideals would shape Gavrilo’s path.  

His father, Petar, was a farmer who grew corn, oats, and barley on just four acres of land, keeping a few cows, sheep, chickens, and a single horse and cart. He and Marija had raised nine children, though many had died young, and to support his large family, Petar worked as a postman in the winter, navigating mountain roads in his wagon to deliver mail between villages. Petar was a devout, soft-spoken man who never drank or swore and found joy in planting trees to line the road from Obljaj to Grahovo with saplings he’d raised himself.

 

Bosnia Under Ottoman and Habsburg Rule

The province into which Gavrilo Princip was born had a complex political history. The Balkans were rich in natural resources like timber, gold, and silver, but Bosnia and Herzegovina, two neighbouring provinces governed as a single region, remained poor. Its population was divided into three main groups. Roughly 40% were Bosnian Serbs, like the Princip family, around 20% were Croats, originally from Croatia, and 35% were Bosnian Muslims, known as Bosniaks. All were ethnically Southern Slavs, but centuries of foreign rule had created religious divides, inequalities, and resentment. In 1463, the Ottoman Empire had conquered Bosnia, killing or enslaving a third of the population. Over time, many Bosnians converted to Islam, in exchange for lower taxes and better job opportunities under Ottoman rule. Old photos and postcards from Bosnia often show people wearing the traditional dress and red fez that identified them as Muslims. Though they were not the majority, foreign photographers often focused on them because they were seen as exotic and unfamiliar by European standards. Bosniaks also tended to live in cities, where they occupied more prestigious roles. In contrast, Serbs, who were Orthodox Christians, lived mainly as rural peasants and were rarely captured on film.  

 

 

By the mid 1800’s, the Ottoman Empire was in decline. In 1878, administrative control of Bosnia and Herzegovina was handed over to the Austro-Hungarian Empire, a recently formed dual monarchy ruled by the centuries-old Habsburg dynasty, which was expanding its influence across Europe. The Empire promised to modernise Bosnia and Herzegovina with schools, roads, and railways, but the new rulers brought in 300,000 troops to maintain order, taxed the population heavily, and preserved the social hierarchy by continuing to favour the Muslim Bosniaks, who had largely supported Ottoman rule and now welcomed the Austrians as their new overlords. The promised infrastructure was built, but primarily for Habsburg troops to move quickly around the region rather than for the benefit of the locals.

 

Education and Ambition

Gavrilo Princip was a reserved boy with dark, bushy hair, a pointed chin, blue eyes, and a slight build. He was known for his determination, sense of humour, and love of books, preferring to help his parents tend their calves than go outside and play. Years later, he would tell Austrian psychiatrist Dr Martin Pappenheim, ‘I was always a quiet, sentimental child, always earnest, with books.’ His mother Marija said, ‘He read much, and kept silent most of the time.’ Marija was determined that her son would be educated, so he walked two miles each day to the primary school in Grahovo. His father Petar would have preferred him to stay at home and look after the sheep, but Gavrilo excelled in the classroom and it quickly became clear that he belonged in an academic environment.

 

 

Moving to Sarajevo and Meeting Danilo Ilić

In 1908, 13-year-old Gavrilo left his village to attend a Merchants’ School in Sarajevo, 150 miles east. The school trained students for careers in business and taught German, the language of the Habsburg authorities. His older brother Jovo travelled with him, helping to arrange cheap lodgings with a widow named Stoja Ilić, who lived with her son Danilo.

 

Danilo was four years older than Gavrilo and a former Merchants’ School pupil himself, and they quickly became friends, spending their free time together playing billiards and chess. Danilo had lost his father, a cobbler, at the age of five, and had worked in various jobs, including as a newsboy, theatre usher, proofreader, and volunteer nurse with the Serbian Army. By 1912, he had graduated from Sarajevo Teachers’ College, and the following year began working as a writer for a Serbian newspaper.

Growing Tensions in Bosnia

Bosnia was slowly industrialising, but for workers, life under Austro-Hungarian rule was harsh. Strikes against low wages, lack of payment, and exhausting hours were met with force, and it was not uncommon for police to open fire on demonstrators, killing and injuring many. A request for a modest nine-hour working day was rejected outright by the authorities, and as the number of uprisings grew, the government imposed repressive measures including censorship, bans on political gatherings, and arrests without trial. This disproportionately affected Bosnian Serbs, who formed the largest and often poorest segment of the rural population, and who were among the most disillusioned with Habsburg rule.

In 1908, Austria-Hungary formally annexed the provinces and established special Bosnian-Herzegovinian army regiments, conscripting men over 21 from all backgrounds, including Croats, Bosniaks, and Bosnian Serbs. The move alarmed neighbouring Serbia, which feared the Austro-Hungarians would try to expand their territory further.

Life in Sarajevo

It was against this backdrop that Gavrilo Princip entered his teenage years. Each summer, he returned home to Obljaj to help in the fields, seeing firsthand the daily struggle of his parents, especially as a third of their harvest was taken in taxes. He also knew that resistance ran deep in his blood. His family had lived in the village since the 18^th century, originally with the surname Jovicevic. They earned the nickname ‘Ceka’, meaning ‘to lie in wait’, for their fierce resistance against the Ottoman raiders and bandits who plagued the remote region, stealing from the already impoverished farmers. One ancestor, a proud man named Todor, was known for riding through the hills on a white horse, dressed head to toe in white, to strike fear into enemies. For his courage, he was known as Princip, meaning ‘Prince’, which eventually became the family surname.

Perhaps it was these stories, and the injustices he witnessed daily, that shaped Gavrilo’s growing nationalist ideals and hatred for the Austro-Hungarian Empire, which ruled Bosnia with an iron fist, even if often disguised by a velvet glove. The empire promoted a façade of benevolence, while clamping down on dissent.

 

At the end of his third year at the Merchants’ School, Gavrilo passed the entrance exams for Sarajevo High School, eager to broaden his education. He was intellectually curious, socially progressive, and quietly rebellious. Though he had a casual attitude to religion, he was accepting of all faiths, believed in equality for women, and neither smoked nor drank. He devoured novels by Alexandre Dumas, Oscar Wilde, and Walter Scott, but his favourites were Arthur Conan Doyle’s Sherlock Holmes stories. These were likely German translations, as they would not have been available in South Slavic languages. He also studied Greek and Latin, wrote poetry, and once said, ‘Books for me signify life.’ As his knowledge grew, so did his disillusionment. He wrote, ‘How could one sleep in this empire of brooding illusions?’ expressing a refusal to remain passive under a regime he believed was built on deception, injustice, and a hollow façade of imperial order. His friends, who recognised his values and intensity, affectionately nicknamed him Gavroche, after Victor Hugo’s street urchin from Les Misérables who gave voice to the poor.

Gavrilo Princip and Young Bosnia

By 1911, Princip had joined the underground movement Young Bosnia, a secret, multi-ethnic nationalist society formed by schoolboys and students, mostly from humble backgrounds, which also counted a small number of women among its members. They were forced to operate underground because such groups were banned, and its goals were radical – to overthrow the Habsburg Empire and secure Bosnia’s sovereignty to build a fairer society. They were inspired by Bogdan Žerajić, who in 1910, had fired five shots at the provincial governor before turning the gun on himself. The governor had survived, but even so, Žerajić’s death made him a martyr for the cause, and Gavrilo admired his commitment to fighting for his country’s freedom.

Around this time, Gavrilo met Nedeljko Čabrinović, who was a year younger, and as outgoing and emotional as Gavrilo was reserved. Though less formally educated, Nedeljko was equally passionate about revolution and frequently clashed with his father, who was a police informant. His sister Vukosava shared their views and soon became friends with Gavrilo, exchanging poems and discussing literature. Both men were frustrated by the older generation’s passivity, feeling they had accepted the annexation of Bosnia too meekly. They believed Austro-Hungarian rule was corrupting Bosnian society, citing the establishment of brothels after the occupation as a symbol of moral decay.

 

Expulsion from Sarajevo High School

In February 1912, Gavrilo was expelled from Sarajevo High School along with 20 others for participating in demonstrations against Austro-Hungarian rule. The protest was violently disbanded by police charging on horseback with sabres drawn, injuring many students. One boy was jailed for setting fire to the Imperial flag, and another, named Djuro Sarac, was imprisoned for announcing his belief during a lesson that annexation was theft. Gavrilo’s defiance extended beyond the classroom. Though not officially documented, contemporaries and later biographies recount an incident where a teenage Gavrilo defended a local girl being harassed by an Austrian officer. Gavrilo was 5’4” and weighed just 110 lbs, but he fearlessly confronted the armed man and was badly beaten for his chivalry.

Belgrade and Political Awakening

After his expulsion, Gavrilo turned his sights to Belgrade, drawn by its reputation as a city of free thinkers, political conspirators, and revolutionaries, possibly encouraged by his friend Danilo Ilić. With a newly prepared passport and little more than a bundle of books tied with a leather strap, he crossed the border to start a new chapter in the sovereign Serbian capital. When he arrived, he found that Belgrade was in the midst of preparing to drive the Turks from Europe in what would become the Balkan Wars. Gavrilo tried to enlist but was rejected by the Serbian army due to his small stature. In the city, he reunited with his schoolfriend Čabrinović, who worked at a printing press producing anarchist literature. Gavrilo spent his days debating ideas with likeminded nonconformists in cafés and libraries. Occasionally, friends back home sent him small amounts of money, but he spent many nights in monasteries that offered shelter to the poor, or, in the worst times, slept in dog kennels. Sometime during this period of hardship, he contracted tuberculosis, though he may have carried the illness unknowingly since childhood.

 

By 1913, the Balkan Wars had ended with Serbia’s decisive victory over the Ottomans, gaining new territory and inspiring many young Bosnians, including Gavrilo. The quiet member of Young Bosnia grew ever more convinced that only direct action could bring about lasting change. Čabrinović’s radicalism also intensified, shaped by anarchist circles, though both continued their studies and took exams at a Belgrade high school.

 

Archduke Franz Ferdinand

The Heir to the Habsburg Throne

Meanwhile, plans were underway for a high-profile imperial visit to Bosnia in June 1914. Emperor Franz Josef, now elderly and in poor health, sent his heir presumptive, his 50-year-old nephew Archduke Franz Ferdinand, to Sarajevo on his behalf. Officially, the visit was to inspect the army and oversee military manoeuvres, but it was also a show of political and military strength to reinforce loyalty, particularly among their Croat and Bosniak supporters. Franz Ferdinand, an Inspector General in the Austro-Hungarian army, was known for his bad temper, stubbornness, impetuous nature, and a reluctance to read anything that contradicted his own views. Though some hoped he would be more liberal than his uncle when he inherited the throne, the evidence suggested otherwise.

He planned to build more Catholic churches and suppress the Serbian Orthodox faith, and declared, ‘We must end the Serbs’ obstruction and pacify the country in two months.’ He also vowed, ‘When I am commander-in-chief, I shall do as I please. If anyone does otherwise, I will have them all shot.’ He was rumoured to suffer from syphilis and had a notorious obsession with hunting. He kept a personal logbook that recorded nearly 275,000 kills over his lifetime, filling his Bohemian castle with the heads of his trophies, stuffed by his personal taxidermist who travelled with him at all times. In one day alone, he shot more than 2,000 animals and game birds.

The Assassination Plot

Planning the Assassination

News of the Archduke’s planned visit to Sarajevo reached Belgrade through a Young Bosnian contact named Pusara. When Gavrilo Princip saw the newspaper clipping, a decisive plan took shape in his mind that would seal his fate and change history. He turned to Čabrinović and asked if he would join an assassination attempt on the Archduke. Čabrinović agreed, and they recruited 18-year-old Trifko Grabež as the third conspirator, who shared a room with them. The three men received weapons and training from the secret ultra-nationalist society Unification or Death, sometimes nicknamed the Black Hand. Its leader, Colonel Dragutin Dimitrijević, known by the pseudonym Apis endorsed the plan, while the weapons were provided by a Bosnian who had joined the Serbian army during the Balkan Wars: four Browning pistols, six hand grenades, and doses of cyanide wrapped in paper, to be swallowed if captured. The grenades were shaped like rectangular bars of soap with detonators capped at one end. Once the cap was unscrewed and struck firmly against a solid object, there was a 12 second fuse before explosion. Princip, the acknowledged leader of the plot, sent coded letters to Danilo Ilić in Sarajevo asking him to recruit more men for the cause.

Smuggling Weapons into Bosnia

On 28 May 1914, Princip, Čabrinović, and Grabež set out from Belgrade under false names. Their eight-day journey by riverboat, on foot, and aided by a schoolteacher and peasants, was arduous. They trudged through muddy fields, waded across rivers with their grenades strapped to their bodies and pistols in their pockets, and navigated dense forests while avoiding detection. They arrived in Sarajevo on 4 June, meeting their organiser Danilo Ilić. By then, a Muslim carpenter named Muhammad Mehmedbašić had also joined the conspiracy. Among the Young Bosnians, excitement was bubbling as word of the plot spread.

 

Preparing the Ambush

Danilo Ilić studied the Imperial Party’s exact route, printed in the newspaper, and carefully planned where each assassin should be positioned along a 300-yard stretch of the Appel Quay. The busy riverside street was lined on one side by grand buildings in muted yellows and creams, their tall windows, iron balconies, and intricate stonework reflecting Sarajevo’s blend of European and Ottoman heritage. On the other side, a low embankment bordered the Miljacka River, crossed by elegant stone bridges. Nearby streets buzzed with shops, cafés, and government offices, while the hills rose behind, dotted with red-roofed houses and minarets. Narrow alleys branched off towards bazaars, tea houses, and vibrant carpet sellers.   

The Assassination of Archduke Franz Ferdinand and Duchess Sophie

The Final Night

The night before the assassination, Gavrilo Princip, Danilo Ilić, and Nedeljko Čabrinović made a solemn pilgrimage to the cemetery where nationalist martyr Bogdan Žerajić was buried, who had attempted to kill the provincial governor four years earlier. To the determined, idealistic trio, he was a hero and an inspiration. Gavrilo laid flowers on the grave and repeated Žerajić’s own words, ‘He who wants to live, has to die. He who is ready to die, will live forever.’ He added quietly, ‘Rest in peace’, making a silent promise to follow the path Žerajić had begun, and succeed where he had not. Each conspirator knew this would be their last night of freedom, yet each was convinced that it was a kind of freedom not worth settling for, until their homeland could be truly free, ruled by its own people, with all Slavs equal beneath their red and gold banner.

The Archduke Arrives in Sarajevo

Yet the Austro-Hungarian regime had plenty of supporters in Bosnia and Herzegovina. On Sunday 28 June 1914, the streets were decked out for celebration. Bands played stirring marches, the black-and-yellow Habsburg double eagle flag flew from buildings, and portraits of the Archduke hung in windows. That morning, Archduke Franz Ferdinand and his wife, Duchess Sophie, attended Mass in a makeshift chapel at their hotel outside Sarajevo. The Hotel Bosna had been closed to all other guests and redecorated for their exclusive use. After Mass, the couple boarded a special train to Sarajevo, then transferred to a motorcade of six chauffeur-driven cars for the final approach. The Archduke and Duchess rode in the third car, a green Graf & Stift limousine trimmed in gold, the Austrian eagle flag flying proudly on the hood. Franz Ferdinand wore the uniform of an Austrian cavalry general: a blue tunic with a high collar adorned with three stars, black trousers with red stripes, and a gold-braided, tasselled sash at his waist.

 

His head was crowned with a hat trimmed with green feathers, perched above his signature upturned moustache. Beside him, Sophie wore a white silk dress and a wide-brimmed white hat with a veil. In the car with them sat General Oskar Potiorek, governor of Bosnia, and Lieutenant Colonel Franz von Harrach was seated beside the driver.

The car arrived in Sarajevo just after 9:30 a.m. The sun shone on the Appel Quay, and the roof of the green limousine had been folded back, leaving Franz Ferdinand and Sophie fully visible to the cheering crowds. As the procession moved towards the town hall, they were accompanied by jubilant music and a thundering 24-gun salute from the surrounding hilltop fortresses. Startled flocks of Sarajevo’s feral pigeons scattered into the sky, settling atop buildings with a bird’s eye view of the scene that was to unfold. As the cars passed, some spectators shouted, ‘Živio!’, meaning ‘long may he live.’

But hidden among the crowds were several assassins who were not there to celebrate the Archduke’s arrival. The seven main conspirators were Danilo Ilić, Trifko Grabež, Nedeljko Čabrinović, Mohammed Mehmedbašić, Vaso Cubrilovic, Cvetko Popović and Gavrilo Princip, spread out along the planned route, while other Young Bosnians dotted the crowd, ready to offer help.

Mehmedbašić spotted the convoy first, but the sight of a nearby policeman made him hesitate, and he quietly slipped away. Another conspirator held his fire, unwilling to risk hitting the Duchess. A third, Popovic, struggled to identify the correct car as he was near-sighted, so he remained hidden within the crowd and let the moment pass.  

The Failed Grenade Attack

At 10:10 a.m., as the cavalcade passed the Cumurija Bridge, Nedeljko Čabrinović calmly approached a policeman and asked which car carried the Archduke. The officer distractedly pointed to the third car. Čabrinović removed the cap from his grenade, struck the detonator against a lamppost to ignite the fuse, and hurled it towards the vehicle. The driver saw it at the last second and accelerated. The grenade struck the folded roof, bounced off, and exploded beneath the car behind, sending shrapnel flying in all directions and seriously injuring several officers. The car carrying Franz Ferdinand sped away to safety. Without hesitation, Čabrinović swallowed his cyanide and plunged over the embankment wall into the Miljacka River, a 26-foot drop. But the poison was too weak or degraded to kill him and only made him vomit. Within minutes, as he floundered in the river that was too shallow to drown him, he was surrounded by police officers and a hail of blows from fists and sabre hilts. As they cuffed him and hauled him away, Čabrinović shouted defiantly, ‘I am a Serbian hero!’. Blood streamed down his face as he was pushed across the bridge towards the Sarajevo state police station for interrogation.

Chaos erupted on the pavement behind the fleeing motorcade. 20 bystanders were wounded in the blast, and people were shouting and crying in a melee of confusion. A woman watching the parade from her bedroom balcony had been struck in the face by shrapnel and her eardrum was shattered by the explosion. Detectives swept the scene in a state of panic, arresting anyone who looked vaguely suspicious, with guilt presumed by appearance, not evidence. Immediately after the attack, Franz Ferdinand turned to Governor Potiorek and said, ‘This fellow must be insane. Gentlemen, let us proceed with our programme.’ Dismissing the attack as the work of a lone agitator, he refused to cancel the visit, unaware that other conspirators still waited in the crowd with the purpose of killing him at any cost. The remaining cars proceeded to the town hall, where the Archduke was scheduled to give a speech. On arrival, he was barely able to conceal his anger, snapping at the waiting officials, ‘I came to Sarajevo for a friendly visit, and someone throws a bomb at me. This is outrageous.’

The Town Hall and Change of Plans

When Gavrilo Princip heard the grenade explode, he hurried towards the commotion, only to learn that the attempt had failed. Disappointed but unnoticed, he drifted back towards his assigned position outside Schiller’s delicatessen on the corner of Appel Quay and Franz Josef Street, near the Latin Bridge. Unknown to Gavrilo, the Archduke had decided to change the plan. After the speech at the town hall, he wanted to visit the hospital to see the officer who had been wounded, rather than continuing on the original route towards the museum he was due to open. In theory, this decision might have saved the Archduke from the assassins, as Gavrilo would have been waiting in the wrong place. But the mysterious hand of fate nudged both men towards their destiny, as the lead driver was not told of the change of plan. As Franz Ferdinand and his entourage climbed back into the motorcars after the town hall visit, Lieutenant Colonel Harrach stood on the running board of the Archduke’s car, on the side nearest the river, to shield him in the event of another attack. 

The Fatal Shots

As the procession reached the corner of Appel Quay and Franz Josef Street, the first car turned right, according to the original plan. The second car, carrying the Chief of Police and the Lord Mayor, followed closely behind it. The driver of the Archduke’s car was about to make the same turn when General Potiorek, suddenly shouted, ‘Stop! You’re going the wrong way.’ The chauffeur stepped hard on the brake, bringing the car to an abrupt halt, directly outside Schiller’s delicatessen, where he slowly began to reverse. Gavrilo Princip, waiting on the corner, realised his moment had come.

The crowd was pressing so tightly around him that he wouldn’t be able to swing his arm to throw a grenade, so instead, he reached for his Browning pistol. A policeman noticed his sudden movement and lunged towards him, but at that moment, another conspirator, Pusara, kicked the officer in the leg, distracting him just long enough for Gavrilo to fire two shots into the open car. The first struck the Archduke in the neck, severing his jugular vein; the second hit Countess Sophie in the abdomen as she rose to help her husband. Seeing blood trickling from Franz Ferdinand’s mouth, General Potiorek ordered the chauffeur to drive at top speed to his own official residence.

 

 

The Arrest of Gavrilo Princip and the Death of Franz Ferdinand

A Lieutenant leapt from one of the cars and charged at the assassin with his sabre, but once again Pusara intervened, rushing to Princip’s defence and charging at the man. Someone else in the crowd punched a policeman in the stomach, while Princip was wrestled to the ground by several officers, who began beating him into submission. In the scuffle, he managed to hit one detective on the head with his revolver, then one witness saw him raise the weapon to his own temple, but someone knocked it out of his hand before he could pull the trigger.

Even while the officers’ blows rained down on him, Gavrilo managed to pull the folded paper from his pocket which contained cyanide and swallowed its contents, but his dose, too, was ineffective and only burnt his mouth. He was eventually subdued and dragged to the police station for questioning. A man named Ferdinand Behr was among those who tried to help Gavrilo during the chaos and was arrested at the scene. A photographer captured his image in the moment, and due to his resemblance to Princip, the photo was widely published in newspapers and books, mistakenly identified as Princip himself, a myth that persists to this day. Pusara was also arrested soon after.

 

Meanwhile, the Archduke’s car raced towards the safety of the governor’s residence. As blood gushed from his neck, Franz Ferdinand was heard to say, ‘Sophie, dear, stay alive for our children.’ Lieutenant von Harrach asked if he was in pain, to which the Archduke replied faintly, ‘It is nothing.’ He repeated the words six or seven times as he slipped in and out of consciousness. Both Franz Ferdinand and Sophie were dead within minutes.

 

 

 

The Road to World War One

Within hours, news of the assassinations swept across Europe, triggering the chain of events that led to the First World War. Gavrilo Princip’s bullets were the spark, but the continent had long been a tinderbox, waiting for a single flash to ignite the powder keg of militarism, nationalism, imperial rivalry, and a web of tangled alliances. For decades, tensions had been mounting, with a naval arms race between Germany and Britain, the rise of militant nationalism, Kaiser Wilhelm II’s aggression, and Austria-Hungary’s obsession with crushing Serbia, which it viewed as a threat to its stability. The assassination gave Vienna its opportunity. It issued an ultimatum to Serbia so harsh no independent nation could accept it, blaming Belgrade to shift attention from Bosnia and justify war against a neighbour whose rising Balkan influence threatened the empire. Germany backed Austria-Hungary with what became known as the ‘blank cheque’, pledging full support for any action Vienna chose to take. Confident in its war plans and eager to strike before Russia grew stronger, Germany pushed forward. When Russia mobilised to defend Serbia, France stood by its ally. On 4 August, Germany invaded Belgium as a shortcut to attack France, and Britain, bound by a treaty to protect Belgian neutrality, declared war the same day. The Balkan crisis exploded into a global war, and Princip’s name would forever be bound to the conflict that claimed over 15 million lives and reshaped the world.  

Trial and Condemnation

Arrests and Reprisals

In the immediate aftermath of the shooting, however, nobody could yet foresee the global catastrophe to come, only that Austria-Hungary’s beloved heir to the throne had been assassinated. At the police station, Gavrilo Princip was formally charged with murder. He did not deny it, saying, ‘I acknowledge it, but I am sorry that I killed the Duchess. I had no intention of killing her.’ The police quickly rounded up his fellow conspirators. Nedeljko Čabrinović was charged with attempted murder and for being an accomplice. Trifko Grabež and Danilo Ilić were arrested soon after, and all were transferred to a military prison. Only Mehmedbašić escaped, slipping across the border into Montenegro. He reportedly spoke openly about his role in the plot, but went unpunished, since his involvement did not fit the official narrative and the authorities preferred to present Muslims as loyal subjects of the Austro-Hungarian Empire.

Violence erupted on the streets of Sarajevo. Supporters of the Empire looted and burned Serbian-owned shops and homes in revenge. The authorities stood by, in some cases actively encouraging the riots. Two Bosnian Serbs were killed in the unrest and several more injured, while dozens of innocent civilians were arrested, beaten, and left to stand in the scorching sun for hours without water. According to one later account, gallows were even erected in the prison courtyard, where several peasants were hanged within full view of the conspirators’ windows — a brutal, bloody message to the young men who had dared to fight for their country’s freedom.

The Investigation

At first, Grabež, Čabrinović and Princip steadfastly refused to name anyone who had aided their plot, even under torture. But when Princip learnt that innocent people were being executed for their actions, he told the judge, ‘I will tell you everything, provided I can speak to the others first. If not, I will confess nothing at all, even if you beat me to death.’ Once granted the chance to confer with his comrades, Princip urged them to reveal how they had acquired their weapons and to identify the Young Bosnians involved, rather than let innocent people continue to suffer.

By then, 25 rebels had been arrested and assigned lawyers, but Princip instructed his own counsel to concentrate their efforts on the defence of the others, saying, ‘Try to save their necks and study their cases thoroughly. You could help them because they are innocent, while I, in any case, am ready to face the worst.’

The Sarajevo Trial

The defence lawyers were appointed only to preserve the illusion of justice and were warned not to exert too much effort on their clients’ behalf. Those deemed too enthusiastic in their defence were threatened with imprisonment or exile. The trial opened in October 1914, held behind closed doors in Sarajevo’s military prison. Three judges presided, with a state attorney prosecuting.

 

Each defendant, the youngest of whom was 16, was given the opportunity to make a statement, and Gavrilo Princip declared with unwavering conviction,

‘I do not feel like a criminal, because I put away the one who was doing evil. Austria represents evil for our people; as it is, it should not exist.’

He spoke from the heart of a peasant’s son, painfully aware of how, in his eyes, his people were treated like cattle under foreign rule. His dream was of a united Slavic state, called Yugoslavia, free from imperial oppression. His friends echoed similar sentiments, with Čabrinović more fiery and confrontational, clashing with the judges, while Grabež emphasised his belief that the people of Bosnia and Herzegovina deserved equal rights.

The state attorney sought to shift blame onto Serbian propaganda, arguing that the conspirators had been manipulated by Belgrade. Princip vehemently denied any outside influence, insisting the assassination had been conceived entirely within their own student circle. Towards the end of the trial, Čabrinović issued a public apology to the children of Franz Ferdinand. Outside the courtroom, the atmosphere remained tense, and students who scrawled slogans such as ‘Death to Tyrants’ and ‘Long Live Yugoslavia’ on their desks were sentenced to up to six years in prison, while four teachers were arrested for failing to report them.

 

Sentences and Executions

The trial concluded on 23 October 1914, with the sentences pronounced five days later. The judges entered the courtroom dressed entirely in black, a sombre and unmistakeable sign that death sentences would be delivered. Danilo Ilić was condemned to hang, while Princip, Grabež and Čabrinović, all underage at the time of the assassination, were sentenced to 20 years’ imprisonment. The prosecution had argued that Princip was over 20 and therefore eligible for the death penalty, but his lawyer successfully proved that he was only 19 at the time. Several others received shorter sentences, while nine peasants who had helped them were acquitted, the court accepting the defence’s claim that they had been coerced into involvement.

 

On 3 February 1915, chief organiser Danilo Ilić, and two of the older conspirators, Miško Jovanović and schoolteacher Veljko Čubrilović were hanged for their roles in facilitating the assassination. According to the executioner’s later account, the men faced the gallows calmly, showing a composure he claimed was unlike anything he had witnessed before.

 

 

Terezín Fortress, Theresienstadt

Following the verdict, Princip, Grabež and Čabrinović were transported by train under heavy guard, while other conspirators were imprisoned throughout Bosnia. In December 1914, Gavrilo was transferred to a military prison within the ancient Habsburg fortress at Theresienstadt, in the far north of the Empire. Surrounded by moats and marshes, with outer walls four feet thick, the fortress was a bleak place, and the last that Princip would ever know.

Life in Solitary Confinement

Inside, he endured bitter cold, malnutrition, and crushing isolation, shackled day and night in irons weighing 22lbs. He was allowed only 30 minutes daily in the courtyard but could have no contact with fellow inmates. In the depths of winter, the water in his jug froze solid. But for Princip, the cruellest deprivation was the denial of any reading material, leaving his mind starved as well as his body. Occasional news of the war filtered into the prison, including the invasion of Serbia by Austro-Hungarian troops and the death and suffering of the South Slavs he had sought to liberate, which Princip’s psychiatrist Dr Martin Pappenheim observed caused him great distress.  

Tuberculosis and Decline

Between 1915 and 1916, Dr Pappenheim interviewed Gavrilo several times and noted,

‘It is very hard in solitary confinement, without books, suffering most from having absolutely nothing to read. Sleeps only four hours in the night. Dreams a great deal. Beautiful dreams about life, about love, not uneasy.’

Gavrilo thought often of his parents and the home where he had grown up. He still hoped that one day, South Slavs would be united in some form of republic, though he wouldn’t live to see it. Tuberculosis had ravaged his body, causing excruciating ulcers and wasting his already fragile frame. He was treated by local surgeon Dr Heinrich Levit, who occasionally brought him chocolate, feeling compassion for the young man who by now resembled a walking skeleton. The last known photograph of Princip, taken in 1915 outside his prison cell, captures his bony fingers uneasily fiddling with the hem of his tattered, oversized jacket, his deep-set eyes haunted by the ghosts of those who died in reprisals or war as a consequence of his actions. Čabrinović and Grabež both succumbed in 1916 to malnutrition and tuberculosis in the brutal conditions. The following year, Princip’s disease worsened, and the surgeon amputated his right arm. But the infection spread to his left, and his elbow joint was fused with wire. The operations failed to save him, and he continued to grow weaker. On 28 April 1918 at 6:30 p.m., 23-year-old Gavrilo Princip died of advanced bone tuberculosis, worn away by years of illness and suffering, just months before the collapse of the Habsburg Empire.

Burial and Reinterment

When night fell, a burial party of five Austro-Hungarian soldiers interred his body in an unmarked grave, hoping his memory would fade into obscurity. After the war, one soldier had a change of heart and came forward, enabling Princip’s remains to be exhumed. In 1920, the bones were returned to Sarajevo for a ceremonial funeral and were reburied in 1939 in the Vidovdan Heroes’ Chapel, alongside comrades Trifko Grabež, Danilo Ilić, and other conspirators, close to the grave of Bogdan Žerajić, the would-be assassin of 1910 who had so deeply inspired the members of Young Bosnia.

The End of the First World War

 

The Armistice that ended the fighting of the First World War came into effect at 11 o’clock on 11 November 1918, bringing to a close a conflict that had claimed millions of lives and left countless more injured or displaced. Remarkably, the number plate of the Archduke’s car read AIII 118, closely resembling the date and time of the Armistice. Was this a sheer coincidence, or a sign that the war and its beginning and end were inevitable, even foretold, and that Princip was destined to pull the trigger that fateful day? 

 

 

Legacy and Controversy

Princip in Yugoslavia

After the war ended, two lines of verse were discovered inscribed on the wall of Princip’s prison cell, a final, small act of defiance. It read,

‘Our ghosts will walk through Vienna, and roam through the Palace, frightening the lords.’

Little of Princip’s writing survives today, much having been destroyed by him and his friend Vukosava, Čabrinović’s sister, before the assassination. In 1918, Yugoslavia was created, in theory fulfilling Princip’s dream of uniting South Slavs. But the reality was very different. Instead of the free, equal republic Princip had dreamed of, the new kingdom was a centralised monarchy dominated from Belgrade, and for many South Slavs, unity quickly turned into disappointment. Even so, in Yugoslavia, Princip was celebrated as a herald of freedom, and a plaque marking the assassination was mounted in Sarajevo. On the other hand, the Austro-Hungarians condemned Princip as a murderer and a terrorist, a view shared by many in the Western world. When Nazi troops invaded Sarajevo in 1941, they tore down the plaque and presented it to Adolf Hitler as a birthday gift. School textbooks often simplify the assassination, omitting the complex web of injustices and aspirations that fuelled Princip’s anger, born of life under occupation. Even today, public opinion in the Balkans is divided. Nationalists revere him as a hero, while others acknowledge that he was an individual within a circle of passionate people driven by conviction, who nonetheless cost the region dearly – with the debate reigniting after the bitter divisions in Bosnia during the 1990s.

Young Bosnia and the Black Hand

Some sources still label Gavrilo Princip a Black Hand assassin. In truth, he was part of the student-led society called Young Bosnia, and the Black Hand’s leaders only gave him support, not orders. The Serbian government itself was wary, keeping at arm’s length to avoid provoking the Austro-Hungarian authorities. Perhaps it is easier to believe in a secret society or shadowy government pulling the strings, rather than face the harder truth: that a young man, driven by the passions and turmoil of his age, set off a chain of events that changed the world.

The Legacy of Gavrilo Princip

In reality, Gavrilo Princip was both a product of his time and a symbol of it; a nationalist, a freedom fighter to some, a terrorist to others. He is forever remembered as the schoolboy-turned-radical who pulled the trigger in Sarajevo, motivated by his vision of South Slav unity and independence. Convinced that diplomacy was futile, he sought swift change and was willing to die for it.

The Latin Bridge in Sarajevo was renamed Princip Bridge but reverted to its original name in the 1990s. The shockwaves from the war Princip helped set in motion continue to ripple across the world, indirectly leading to social and political change; some positive, some negative, and many unexpected. Thanks to the war, women entered the workforce in large numbers, leading to voting rights in many countries, and the rigid social class structure began to break down as men from diverse backgrounds fought side by side in the trenches. Colonised peoples were inspired to challenge imperial rule, and socialist and communist movements gained ground. The Austro-Hungarian, Ottoman, Russian, and German empires fell, redrawing the global political map, and the US emerged as a growing influential power. Wartime medicine advanced rapidly, improving surgery, psychiatry, and hygiene. Even literature and culture were touched, as Belgian refugees arriving in Britain inspired author Agatha Christie to create Hercule Poirot, the famous Belgian detective who remains a star of books, stage, and screen today. This irony might even have earned a wry smile from Gavrilo himself, with his love of Sherlock Holmes stories.  

As with all history, there are more than two sides to the story, and the truth often lies somewhere in between. Whether he was nothing more than a terrorist, or a young man fighting for his ideals and his country’s sovereignty, it is indisputable that few famous figures, and fewer still at so young an age, have borne consequences as immense as Gavrilo Princip.

Researched and written by Prash Ganendran. Published on 7 October 2025.
© 2025 Prash Ganendran. All Rights Reserved.

My Video Documentary Version of this Case

Watch on YouTube

Sources

Dedijer, Vladimir. The Road to Sarajevo. London: MacGibbon & Kee, 1966.

Butcher, Tim. The Trigger: Hunting the Assassin Who Brought the World to War. London: Chatto & Windus, 2014.

Feuerlicht, Roberta Strauss. The Desperate Act: The Assassination of Franz Ferdinand at Sarajevo. London: McGraw-Hill, 1968.

Additional references

Aichelburg, Wladimir. Erzherzog Franz Ferdinand und Artstetten. Vienna: Verlag der Österreichischen Staatsdruckerei, 1986.

Woolf, Alex. Assassination in Sarajevo. Oxford: Heinemann, 2002.

Ullman, Harlan. A Handful of Bullets: How the Murder of Archduke Franz Ferdinand Still Menaces the Peace. New York: Potomac Books, 2014.

Liulevicius, Vejas Gabriel. World War I: The “Great War”

Culpin, Christopher. Making History. Oxford: Oxford University Press, 1996