
On 23 July 1914, the Austro-Hungarian government issued Serbia with an ultimatum containing harsh demands in order to prevent an escalation following the assassination of Archduke Franz Ferdinand and his wife Sophie by a Serbian nationalist. The Serbian government was required to officially distance itself from the political campaign to unite the southern Slav peoples under Serbian leadership, as well as to suppress anti-Austrian propaganda and eliminate terrorist organizations within its borders. Serbia was given 48 hours to respond and although it accepted most of the demands, it rejected the final point concerning the participation of Austrian officials in investigations on Serbian territory. As a result, Austria-Hungary broke off diplomatic relations with Serbia and declared war on 28 July, marking the start of World War I.
| Characteristics | Values |
|---|---|
| Date of the ultimatum | 23 July 1914 |
| Time of delivery | 6:00 PM |
| Austrian representative | Baron Giesl von Gieslingen, ambassador of the Austro-Hungarian Empire to Serbia |
| Serbian representative | Lazar Paču, Serbian finance minister |
| Demands | 6 |
| Response time | 48 hours |
| Serbian response | Accepted most demands but rejected Austrian participation in investigations on Serbian territory |
| Outcome | Austria-Hungary declared war on Serbia |
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What You'll Learn

Austria-Hungary's ultimatum to Serbia was issued on 23 July 1914
On 23 July 1914, the Austro-Hungarian government issued an ultimatum to Serbia, nearly a month after the assassination of Archduke Franz Ferdinand and his wife, Sophie, by a Serbian nationalist in Sarajevo, Bosnia. The ultimatum, delivered by the Austrian ambassador to Serbia, Baron Giesl von Gieslingen, to the Serbian foreign ministry, contained a series of demands aimed at curbing Serbian nationalist aspirations and suppressing anti-Austrian sentiment in the country.
The specific demands of the ultimatum included the suppression of anti-Austrian propaganda in Serbia, the dissolution of nationalist organisations, and the acceptance of Austro-Hungarian officials in the investigation and prosecution of the Archduke's assassins. The Serbian government was given 48 hours to respond to the ultimatum, which it did on 25 July, accepting most of the demands but refusing to allow Austrian officials to operate on Serbian territory.
The Austro-Hungarian government had been emboldened by the support of its allies in Berlin, who encouraged a hard-line approach towards Serbia. The ultimatum was designed to force a military conflict with Serbia before its powerful ally, Russia, could react. However, Russia's council of ministers met on 24 July to determine a course of action, and Russia ordered a partial mobilisation, indicating that a broader conflict was becoming increasingly likely.
The response of the Serbian government, while largely accepting the ultimatum's demands, was not enough to satisfy Vienna, and the Austro-Hungarian ambassador broke off diplomatic relations with Serbia. This exchange set in motion a series of events that ultimately led to the outbreak of World War I, as the conflict quickly escalated beyond the Balkans and drew in the major powers of Europe.
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The ultimatum contained six concrete demands
On the 23rd of July 1914, the Austro-Hungarian government issued Serbia with an ultimatum containing six concrete demands. This was nearly a month after the assassination of Austrian Archduke Franz Ferdinand and his wife, Sophie, by a young Serbian nationalist named Gavrilo Princip in Sarajevo, Bosnia. The demands were formulated in six points as follows:
- The Serbian government was required to officially distance itself from the political campaign to unite the southern Slav peoples under Serbian leadership, which challenged the territorial integrity of Austria-Hungary.
- The purging of the Serbian army and civil service of anti-Austrian agitators.
- The suppression of anti-Austrian propaganda in the Serbian press.
- The suppression of subversive movements in Serbia, with the collaboration of representatives of the Austro-Hungarian government.
- Judicial proceedings against accessories to the plot of the 28th of June (the date of the assassination) who were on Serbian territory, with delegates of the Austro-Hungarian government participating in the investigation.
- The acceptance of Austro-Hungarian delegates (law enforcement officers) to take part in the investigation and bring to trial all accessories to the Archduke's assassination.
The ultimatum caused a stir in foreign capitals, with many believing that no state could accept such demands. The initial consequence of Serbia's partial refusal was the breaking off of diplomatic relations, with Austria declaring war on Serbia on July 28, 1914.
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Serbia was given 48 hours to respond
On 23 July 1914, the Austro-Hungarian government issued Serbia with an ultimatum containing a series of demands. This ultimatum came nearly a month after the assassination of Austrian Archduke Franz Ferdinand and his wife by a young Serbian nationalist in Sarajevo, Bosnia. The Austrian officials suspected that the Serbian government either orchestrated the assassination or, at the very least, knew who was behind it.
The ultimatum was delivered by Baron Giesl von Gieslingen, the ambassador of the Austro-Hungarian Empire to Serbia, to the Serbian foreign ministry. It included six concrete demands, which were designed to be as unacceptable as possible. The Serbian government was required to officially distance itself from the campaign to unite the southern Slav peoples under Serbian leadership, posing a challenge to the territorial integrity of Austria-Hungary. Additionally, Serbia was to purge its army and civil service of anti-Austrian agitators and suppress anti-Austrian propaganda in its press.
Serbia was given just 48 hours to respond to the ultimatum. During this tense period, the world anxiously awaited Serbia's decision. Germany worked diplomatically to contain the fallout from the ultimatum, but none of the other great powers were inclined to support Austria-Hungary, recognising its relatively weak military position. Serbia's most important ally, Russia, ordered a partial mobilisation before the deadline, signalling that any further escalation would lead to catastrophic results.
On 25 July, Serbia's answer arrived within the 48-hour window. Serbia accepted the majority of the demands but rejected the final point, refusing to allow Austrian officials to participate in investigations on Serbian sovereign territory. This response surprised observers, as Serbia had conceded to most of the stringent demands. However, the Austrian foreign minister's refusal to consider further negotiations made it evident that Vienna was not interested in a diplomatic resolution. As a result, diplomatic relations between the Dual Monarchy and Serbia were severed, paving the way for the outbreak of World War I.
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Serbia accepted most demands but rejected Austrian officials on its sovereign territory
On 23 July 1914, nearly a month after the assassination of Austrian Archduke Franz Ferdinand and his wife by a Serbian nationalist, Austria-Hungary issued an ultimatum to Serbia. The document contained six concrete demands, which were designed to be unacceptable. The Serbian government was required to distance itself from the campaign to unite the southern Slav peoples under Serbian leadership, which challenged Austria-Hungary's territorial integrity. Serbia was also to suppress anti-Austrian propaganda and eliminate terrorist organisations within its borders, such as the Black Hand, which was believed to have aided the archduke's assassins.
Serbia's response arrived within the 48-hour deadline on 25 July, accepting most demands but rejecting the final point concerning the participation of Austrian officials in investigations on Serbian sovereign territory. This response surprised many, but the Austrian foreign minister refused any further negotiations, making it clear that Vienna was not interested in a diplomatic solution. Instead, Austria-Hungary broke off diplomatic relations with Serbia and declared war on 28 July.
The immediate reason for the ultimatum was the assassination of the Archduke, but the deeper reason was the contest for power in the Balkans. Both Austria and Serbia had their sights set on acquiring the remains of the collapsing Ottoman Empire. With Franz Ferdinand's death, Austria had a pretext to put Serbia, who they saw as a smaller and weaker nation, in its place. However, Russia was Serbia's patron, and if Austria marched on Serbia, Russia would likely come to their aid. This concern led to the delay in sending the ultimatum until after the Franco-Russian summit.
The ultimatum caused a stir in foreign capitals, with British Foreign Secretary Sir Edward Grey declaring that he had "never before seen one state address to another independent state a document of so formidable a character". Despite Germany's diplomatic efforts to contain the effects of the ultimatum, it was clear that any further steps would lead to an escalation with catastrophic results.
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Austria-Hungary declared war on Serbia on 28 July 1914
On 28 July 1914, Austria-Hungary declared war on Serbia. This was the culmination of a series of events that began with the assassination of Archduke Franz Ferdinand and his wife, Sophie, in Sarajevo, Bosnia, on 28 June 1914. The assassination was carried out by Gavrilo Princip, a Bosnian Serb nationalist.
Austria-Hungary believed that the Serbian government was complicit in the assassination and delivered an ultimatum to Serbia on 23 July 1914. The ultimatum contained a set of demands, including that Serbia accept an Austro-Hungarian inquiry into the assassination, suppress anti-Austrian propaganda, and take steps to eliminate terrorist organisations within its borders. Serbia was given 48 hours to respond.
Serbia's response, delivered on 25 July, accepted most of the demands but rejected the participation of Austrian officials in investigations on Serbian territory, citing the violation of its Constitution and criminal procedure law. This response surprised many, as Serbia had gone further than expected in accepting the majority of the demands. However, Austria-Hungary was not interested in a diplomatic solution and broke off diplomatic relations with Serbia.
The ultimatum and subsequent declaration of war by Austria-Hungary were part of a plan developed with the German foreign office to force a military conflict with Serbia. Vienna hoped for a quick and decisive victory before Serbia's powerful ally, Russia, had time to react. However, Russia ordered a partial mobilisation on 24 July, indicating that a broader conflict was becoming increasingly likely.
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Frequently asked questions
The Austro-Hungarian government issued Serbia with an ultimatum containing 6 concrete demands in order to prevent an escalation following the assassination of Archduke Franz Ferdinand and his wife Sophie. The demands included that Serbia suppress all anti-Austrian propaganda and take steps to root out and eliminate terrorist organizations within its borders.
Serbia responded within the 48-hour deadline, accepting most of the demands but rejecting the demand concerning the participation of Austrian officials in investigations on Serbian territory.
The Austrian foreign minister refused to consider any further negotiations, making it clear that Vienna was not interested in a diplomatic solution. Baron Giesl von Gieslingen, the ambassador of the Austro-Hungarian Empire to Serbia, broke off diplomatic relations with Serbia.
The exchange of ultimatums and the breakdown of diplomacy led to a declaration of war by Austria-Hungary on Serbia on July 28, 1914, which ultimately resulted in the First World War.



























