
Austria and Serbia have had a long history of complex relations, dating back to the Great Turkish War and the era of the Habsburg monarchy. However, the most notable event that fuelled their enmity was the assassination of Archduke Franz Ferdinand, the heir to the Austro-Hungarian throne, and his wife on June 28, 1914, by a Serbian-backed terrorist, Gavrilo Princip. This incident sparked a series of events that ultimately led to the outbreak of World War I. Austria-Hungary, encouraged by its ally Germany, issued an ultimatum to Serbia, which was largely accepted, except for a few demands. Nonetheless, Austria-Hungary declared war on Serbia on July 28, 1914, marking the beginning of a global conflict.
| Characteristics | Values |
|---|---|
| Date of conflict | 28 July 1914 |
| Reason | Austria-Hungary declared war on Serbia |
| Reason | Assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, and his wife by a Serbian-backed terrorist |
| Reason | Austria-Hungary saw Serbia as a threat to the stability of its multi-ethnic empire |
| Reason | Austria-Hungary feared the sudden growth of Serbia |
| Reason | Austria-Hungary wanted to crush Serbian ambitions to unify south-east Europe's Slavic people |
| Reason | Austria-Hungary wanted to stop Russia from gaining control of Serbia |
| Result | First World War |
| Result | The First World War destroyed the Austro-Hungarian Empire |
| Result | Serbia annexed much of the former Austrian holdings in the Balkans to become the Kingdom of Serbs, Croats, and Slovenes, later the Kingdom of Yugoslavia |
| Result | Austria was eventually annexed by Germany in 1938 |
| Current relations | Austria has an embassy in Belgrade, Serbia |
| Current relations | Serbia has an embassy in Vienna and a general consulate in Salzburg, Austria |
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What You'll Learn
- Austria-Hungary's annexation of Bosnia-Herzegovina in 1908 angered Serbia
- Serbia's ambitions to unify southeast Europe's Slavic people
- Austria-Hungary's ultimatum to Serbia on 23 July 1914
- Serbian nationalist Gavrilo Princip assassinated Archduke Franz Ferdinand
- Germany's support for Austria-Hungary and opposition to international convention

Austria-Hungary's annexation of Bosnia-Herzegovina in 1908 angered Serbia
Austria-Hungary's annexation of Bosnia-Herzegovina in 1908 was a significant source of tension between Austria-Hungary and Serbia, leading to a deterioration in their already strained relationship. The annexation was a unilateral action, sparking protests from Serbia and other Balkan neighbours. This was a critical event that permanently damaged relations between the two countries.
The annexation occurred during a period of shifting power dynamics in the Balkans. The decline of the Ottoman Empire left a power vacuum, and the Balkan states vied for territorial gains and influence. Austria-Hungary had long desired to expand its influence in the region and saw the opportunity to formally incorporate Bosnia and Herzegovina into its empire. The Young Turk Revolution in the Ottoman Empire provided the perfect opportunity, as Austrian-Hungarian authorities feared the revolution's pro-autonomy message would spread to Bosnia and Herzegovina, which had been under Austrian-Hungarian administration since 1878.
The annexation caused significant unrest among the Serb population, who, along with the Muslims, opposed being ruled by a Christian emperor. The Serbian government, under King Peter I, pursued a pro-Russian course, further alienating Austria-Hungary. In response, Vienna imposed economic sanctions and a trade embargo on Serbia, exacerbating existing tensions.
The annexation crisis also had broader diplomatic implications. It led to protestations from other Great Powers and damaged relations with neighbouring countries, particularly Serbia, Italy, and Russia. Serbia initially protested the annexation but eventually recognised it under pressure from the Great Powers. This recognition, however, did not repair the strained relationship between Austria-Hungary and Serbia.
The annexation of Bosnia-Herzegovina was a critical event that fuelled the rivalry and competition for power between Austria-Hungary and Serbia. It contributed to the complex web of alliances and enmities that characterised pre-World War I Europe and set the stage for the assassination of Archduke Franz Ferdinand in 1914, which ultimately ignited the First World War.
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Serbia's ambitions to unify southeast Europe's Slavic people
Serbia is a Slavic nation located in Southeast and Central Europe. It is bordered by Hungary, Romania, Bulgaria, North Macedonia, Croatia, Bosnia and Herzegovina, and Montenegro. Serbia also claims a border with Albania through the disputed territory of Kosovo.
The Balkan Wars, fought between the Balkan states over the remnants of the Ottoman Empire, resulted in Serbia gaining new territories and emerging as a larger and more assertive presence in southeast Europe. Austria-Hungary, feeling threatened by Serbia's growing influence, twice tried to force Serbia to withdraw from its newly gained positions through ultimatums. However, neither Italy nor Germany was willing to support military action, and Austria-Hungary ultimately had to acquiesce to Serbia's territorial gains.
Serbia's ambitions to unify Slavic territories continued to be a source of tension with Austria-Hungary, which saw Serbia as a threat to the stability of its multi-ethnic empire. The assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, by a Bosnian-Serb terrorist in June 1914 provided the spark that ignited the powder keg of tensions between the two nations. Austria-Hungary, suspecting Serbian backing for the assassination, used the incident as a pretext to crush the Serbian threat once and for all. With the encouragement of its ally Germany, Austria-Hungary presented Serbia with an ultimatum, demanding, among other things, the suppression of anti-Austrian propaganda and the participation of Austro-Hungarian officials in the investigation of the archduke's killing. Despite Serbia accepting all demands except one, Austria-Hungary broke diplomatic relations and declared war on July 28, 1914, marking the start of World War I.
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Austria-Hungary's ultimatum to Serbia on 23 July 1914
The roots of the enmity between Austria and Serbia can be traced back to the Balkan Wars of 1912-13, fought by Balkan states over the remnants of the Ottoman Empire. Austria-Hungary twice threatened Serbia with an ultimatum to force it to withdraw from its gained positions. However, Austria-Hungary had to concede Serbia's territorial gains due to a lack of support from Italy and Germany. Serbia's victory over Bulgaria in July 1913 further heightened tensions, as Bulgaria later joined forces with Austria-Hungary and Germany during World War I.
The assassination of Archduke Franz Ferdinand, the heir to the Austro-Hungarian throne, and his wife on June 28, 1914, by a Serbian nationalist in Sarajevo, Bosnia, served as a pivotal moment in the escalating tensions. Austria-Hungary, with encouragement and support from Germany, sought to hold Serbia accountable for the assassination and drafted an ultimatum. This ultimatum, presented to Serbia on July 23, 1914, was deliberately provocative and included demands such as suppressing anti-Austrian propaganda and allowing Austria-Hungary to conduct an investigation into the archduke's killing.
Serbia's response to the ultimatum, delivered on July 25, accepted all demands except for the participation of Austro-Hungarian officials in internal inquiries, citing it as a violation of its sovereignty. Austria-Hungary rejected this reply and broke diplomatic relations with Serbia, paving the way for a military invasion. On July 28, 1914, Austria-Hungary declared war on Serbia, marking the beginning of World War I.
The conflict quickly escalated into a global war, with Russia's support for Serbia bringing France into the conflict. Germany, allied with Austria-Hungary, declared war on Russia and France, while its violation of Belgian neutrality drew Britain into the war. The complex web of alliances and growing nationalism, militarism, and imperial rivalry transformed a localized crisis in southeast Europe into a worldwide conflagration.
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Serbian nationalist Gavrilo Princip assassinated Archduke Franz Ferdinand
On 28 June 1914, Serbian nationalist Gavrilo Princip assassinated Archduke Franz Ferdinand of Austria and his wife, Duchess of Hohenberg, Sophie. The assassination took place during the Archduke's visit to Sarajevo, the provincial capital of Bosnia and Herzegovina, which had been annexed by Austria-Hungary in 1908. Gavrilo Princip was a Bosnian Serb student and a Yugoslav nationalist who believed in the unification of all South Slavs. He was part of a group of six Bosnian assassins, five of whom were Bosnian Serbs and members of a student revolutionary group called Young Bosnia.
The assassination was a significant event that led to World War I. Austria-Hungary, perceiving Serbia's nationalist ambitions as a threat to the stability of its multi-ethnic empire, seized upon the assassination as a pretext for action against Serbia. The Austro-Hungarian foreign office drafted an ultimatum, with the support of Germany, holding the Serbian government responsible for the assassination and making various demands, including the suppression of all anti-Austrian propaganda within Serbia.
The ultimatum was presented to Serbia on 23 July 1914, and while Serbia accepted almost all of the demands, Austria-Hungary was not satisfied and broke off diplomatic relations on 25 July. On 28 July, Austria-Hungary declared war on Serbia, marking the start of World War I. The conflict quickly escalated as other European powers, including Germany, France, Russia, and Great Britain, became involved through a series of alliances and declarations of war.
Gavrilo Princip's actions, though controversial, are viewed by some Serbs as heroic. In 2014, a statue of Princip was unveiled in Belgrade by the President of Serbia, who described Princip as a "hero" and a "symbol of liberation ideas". Serbian history textbooks also deny that Serbia or Princip were responsible for starting World War I, instead blaming the Central Powers.
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Germany's support for Austria-Hungary and opposition to international convention
Germany's support for Austria-Hungary was not a new development during World War 1. In 1879, Germany formed an alliance with neighbouring Austria-Hungary, which Italy joined three years later. This alliance was strengthened when Germany opposed a French takeover of Morocco, with Britain's support for France worsening the divide among the European powers.
In the context of World War 1, Germany's support for Austria-Hungary was evident in the latter's conflict with Serbia. Following the assassination of Archduke Franz Ferdinand, heir to the Austrian throne, by a Serbian-backed terrorist, Austria-Hungary sought to use the opportunity for a final reckoning with Serbia. They drafted an ultimatum, blaming the Serbian government for the assassination and making several demands. Germany supported and encouraged Austria-Hungary in this aggressive stance, promising full support for a severe response against Serbia.
On July 28, 1914, Austria-Hungary, with German encouragement, declared war on Serbia. Germany's role in this declaration was significant, as they pressured Austria-Hungary for quick action and advised them to reject any notion of an international convention to moderate the conflict, as proposed by the British Foreign Office.
Germany's ambitions, fear of 'encirclement', and perception of isolation drove its foreign policy and support for Austria-Hungary. They placed their strategic and national plans above Austro-Hungarian interests, turning the Balkan conflict into a continental war by declaring war on Russia and France. This was in line with their war plan, which was time-sensitive and aimed at defeating France before Russia could fully mobilise its army.
Germany's violation of Belgian neutrality and British fears of German domination in Europe further escalated the conflict, bringing Britain and its empire into the war. Thus, Germany's support for Austria-Hungary and opposition to international mediation played a crucial role in the expansion of World War 1.
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Frequently asked questions
On June 28, 1914, Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, and his wife were assassinated by a Serbian-backed terrorist, Gavrilo Princip. Austria-Hungary, with German encouragement, used this as an opportunity for a final reckoning with Serbia and declared war on July 28, 1914.
Austria had long seen Serbia as a threat to the stability of its multi-ethnic empire. Serbia's growth and ambition in the Balkans region, as well as its alliance with Russia, were causes for concern for Austria-Hungary. The results of the Balkan Wars of 1912-1913, in which Serbia gained control of the Adriatic coastline and parts of Macedonia, further strained relations. Austria-Hungary twice tried to force Serbia to withdraw from its gained positions but ultimately had to acquiesce to Serbia's territorial gains.
Austria-Hungary's declaration of war on Serbia, known as the July Crisis, set off a chain of events that led to World War I. Russia's support of Serbia brought France into the conflict. Germany, allied with Austria-Hungary, declared war on Russia and France. Germany's violation of Belgian neutrality and Britain's fears of German domination in Europe brought Britain and its empire into the war, thus expanding the conflict into a global war.











































