
The assassination of Archduke Franz Ferdinand and his wife on 28 June 1914 was the catalyst for a series of events that led to Germany and Austria-Hungary declaring war on Russia. Austria-Hungary, with encouragement and support from Germany, issued an ultimatum to Serbia on 23 July, intending to start a war. Russia, a supporter of Serbia, ordered a partial mobilisation of its armed forces on 30 July, which was seen as an aggressive act of war by Germany and Austria-Hungary. On 31 July, Germany sent an ultimatum to Russia demanding it demobilise, and when Russia did not comply, Germany declared war on 1 August 1914.
| Characteristics | Values |
|---|---|
| Date of Germany's declaration of war on Russia | 1 August 1914 |
| Date of Austria-Hungary's declaration of war on Serbia | 28 July 1914 |
| Reason for Austria-Hungary's declaration of war on Serbia | Assassination of Archduke Franz Ferdinand by a Serbian-backed terrorist |
| German support for Austria-Hungary | Encouraged Austria-Hungary to declare war on Serbia; provided assurance of support in the event of a Russian intervention |
| Russian support for Serbia | Russia ordered mobilisation of forces on 30 July 1914; Russia's support for Serbia brought France into the conflict |
| German response to Russian mobilisation | Germany demanded Russia demobilise; when Russia did not comply, Germany declared war on Russia |
| German war plan | To beat France before Russia could get its army fully into action; to invade France through neutral Belgium |
| British involvement | German invasion of Belgium prompted Britain to declare war on Germany |
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What You'll Learn

Germany's support for Austria-Hungary against Serbia
The assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, and his wife on 28 June 1914 was the catalyst for the conflict between Austria-Hungary and Serbia. The assassination was carried out by a Serbian-backed terrorist, which heightened tensions between the two nations. Austria-Hungary had long viewed Serbia as a threat to the stability of its multi-ethnic empire, and the assassination provided an opportunity to deal with this threat.
Austria-Hungary sought Germany's support, which was readily given. Germany guaranteed its backing through what became known as a "blank cheque", encouraging a swift attack on Serbia to localise the conflict and avoid drawing in Russia, Serbia's powerful ally. Germany's support was crucial, as Austria-Hungary recognised that a conflict with Serbia would likely lead to a war with Russia. Germany shared Austria-Hungary's desire to suppress Serbian ambitions in the Balkans, which threatened to destabilise the region.
On 23 July 1914, Austria-Hungary issued an ultimatum to Serbia, demanding the suppression of anti-Austrian propaganda and the allowance for Austria-Hungary to conduct its own investigation into the assassination. Serbia's response, delivered on 25 July, accepted all terms except one, refusing to allow Austro-Hungarian officials to participate in judicial proceedings on Serbian soil. This refusal was unacceptable to Austria-Hungary, which broke diplomatic relations and began preparing for war.
Germany played a key role in encouraging and supporting Austria-Hungary's aggressive stance towards Serbia. The German Army wanted Austria-Hungary to act quickly, believing the time was right for a general war, as Germany was better prepared than either Russia or France. Germany's ambitions, fear of isolation, and perception of encirclement influenced its foreign policy decisions. The conflict between Austria-Hungary and Serbia, fuelled by German support for the former, ultimately escalated into World War I, as Russia's mobilisation in support of Serbia brought France and eventually Britain into the war.
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Russia's refusal to demobilise
Austria-Hungary, with encouragement and assurances of support from Germany, issued an ultimatum to Serbia on July 23, 1914, with demands designed to be rejected. Serbia accepted all but two of the terms, but this was not enough to prevent war. On July 28, 1914, Austria-Hungary declared war on Serbia. Russia, which had interests in maintaining influence in the Balkans, ordered a general mobilisation in support of Serbia on July 30, 1914.
Germany, following through on its promise to support Austria-Hungary, demanded that Russia demobilise on July 31, 1914. Russia's refusal to comply with this ultimatum led to Germany declaring war on Russia on August 1, 1914. Russia's mobilisation was viewed as an aggressive act of war by Germany and Austria-Hungary, even though Russia considered it a precautionary measure. Germany's war strategy depended on swiftly defeating France before Russia could fully mobilise its massive army.
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Russia's support for Serbia
On 28 June 1914, Archduke Franz Ferdinand, the heir to the Austro-Hungarian throne, and his wife were assassinated by a Serbian-backed terrorist. This event set off a series of political, diplomatic and military decisions that led to the First World War.
Serbia's sovereignty was threatened by Austria-Hungary, which sought to inflict a military blow on Serbia to demonstrate its strength and to dampen Serbian support for Yugoslav nationalism. On 23 July, Austria-Hungary issued an ultimatum to Serbia, intending to start a war. Serbia's reply, which conceded to all the ultimatum's terms except one, was rejected by Austria-Hungary, which declared war on Serbia on 28 July.
On 24 July 1914, the Serbian regent, Alexander, sent a telegram to Russian Tsar Nicholas II, appealing for assistance in dealing with Austria-Hungary's menacing stance against Serbia. Russia was willing to help Serbia, but it was to no avail as Austria-Hungary declared war on Serbia four days later.
Russia's decision to go to war for Serbia in 1914 has been debated by historians. Some argue that it was a blunder, as the Balkan region was not of significant strategic value to Russia. Others contend that Russia's sense of 'prestige' and the idea of spheres of influence among the ruling classes of Europe at the time meant that Russia felt provoked by Austria-Hungary's actions against its Serbian ally and felt the need to respond forcefully.
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Growing nationalism and militarism
The early 20th century saw a surge in nationalism across Europe, particularly within the so-called Great Powers of Britain, France, and Germany. This intense form of patriotism or loyalty to one's country led many Europeans to believe in their nation's cultural, economic, and military supremacy. The expansion of European empires, also known as imperialism, was a key contributor to this sentiment. Nations like Britain and France, with their vast global empires, experienced rapid economic transformation, imperial growth, and social modernisation, fuelling their sense of dominance.
German nationalism was closely tied to German militarism, with the strength of the nation perceived as directly linked to the strength of its military forces. The new Kaiser, Wilhelm II, embodied this nationalistic Germany, driven by ambition, obsession with military power, and a desire for imperial expansion. He envied Britain's vast empire and commercial enterprise and saw it as an obstacle to German progress. German culture was promoted and celebrated, fostering a sense of national pride.
Similarly, in Russia, nationalism was prevalent, with Tsar Nicholas II believing his empire was divinely sustained and protected by its massive standing army, the largest peacetime force in Europe. Russian commanders held a similar belief in their military superiority due to their country's vast population. This nationalism influenced their foreign policy decisions and alliances, such as their support for Serbia against Austria-Hungary, which ultimately contributed to the outbreak of World War I.
Nationalism and militarism were closely intertwined in the lead-up to the war. Militarists admired military values such as self-sacrifice, discipline, and obedience, and war was romanticised as an adventure or opportunity to demonstrate patriotism. Youth groups, like the Boy Scouts, emphasised physical fitness, military discipline, and nationalism, shaping the minds of the next generation. The belief in militarism, that a nation's strength was dependent on its military might, influenced the decisions of European leaders, who were willing to go to war to defend or expand their national interests.
In summary, growing nationalism and militarism in the late 19th and early 20th centuries contributed significantly to the outbreak of World War I. The intense patriotism, belief in military supremacy, and pursuit of imperial expansion fuelled tensions among European powers, ultimately leading to the declaration of war between Germany and Austria-Hungary against Russia and its allies.
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Competition for power and influence
The events leading up to World War I were influenced by a competition for power and influence among European nations. This rivalry was particularly acute in the Balkans, a region that had been a “hotbed of unrest” with two wars in the preceding three years. Serbia's expansion in the region, aided by its alliance with Russia, was seen as a threat by Austria-Hungary and Germany.
Austria-Hungary, with German encouragement, sought to punish Serbia and quash Serbian nationalism, which had been blamed for the assassination of Archduke Franz Ferdinand in June 1914. Germany supported Austria-Hungary's desire to assert its dominance in the region and viewed the situation as an opportunity to start a general war, believing that they were more prepared than Russia or France. On July 23, 1914, Austria-Hungary, assured of German backing, issued an ultimatum to Serbia, which was largely rejected. Russia, which sought to control the Balkans and gain a military advantage over Germany and Austria-Hungary, declared its intention to back Serbia, and on July 30, it announced a general mobilization in support of Serbia.
Germany and Austria-Hungary perceived Russia's mobilization as an aggressive act of war. On July 31, Germany sent an ultimatum to Russia demanding it demobilize, and when Russia did not comply, Germany declared war on Russia on August 1, 1914. Germany's violation of Belgian neutrality and British fears of German domination in Europe brought more countries into the war, leading to a wider European conflict.
The decisions for war were shaped by growing nationalism, increased militarism, and the system of opposing alliances that had developed over the previous decades. Europe's leaders were willing to go to war to defend or expand their national interests and viewed military strength as an essential part of power.
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