
On October 7, 1879, Austria-Hungary and the German Empire formed the Dual Alliance, a defensive pact in which they promised to support each other in the event of an attack by Russia and remain neutral if either empire was attacked by another power. The alliance was formed by German Chancellor Otto von Bismarck, who wished to portray Germany as a peacemaker and preserve the European status quo. The treaty was kept secret between the two empires and was valid for five years, with the option to renew.
| Characteristics | Values |
|---|---|
| Date of Alliance | 7 October 1879 |
| Type of Alliance | Defensive |
| Parties Involved | Austria-Hungary, German Empire |
| Purpose | To prevent war, to preserve peace, to prevent isolation of the German Empire |
| Terms | Support in case of attack by Russia, benevolent neutrality in case of aggression by another European power |
| Validity | 14 days after approbation by the two Exalted Sovereigns |
| Duration | 5 years |
| Result | Formation of the Triple Alliance with Italy in 1882 |
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What You'll Learn

The Dual Alliance treaty was signed on October 7, 1879
The alliance was a surprising development at the time. Germany and Austria-Hungary had become allies only recently, in 1878, after the Treaty of Berlin reversed Russia's gains from the Treaty of San Stefano, which had granted Russia considerable influence in the Balkans, to the outrage of Austria-Hungary. The Dual Alliance was also surprising because the two powers were somewhat mismatched. The Habsburg Monarchy was the junior partner in the alliance, and the two powers had different aims and strategies. Vienna and Berlin often overestimated each other's capabilities, and there was little in the way of military-strategic cooperation.
The treaty was initially set to last for five years, with the option to renew. It was renewed and remained an important element of German and Austro-Hungarian foreign policy until 1918. In 1882, Italy joined the alliance, which then became known as the Triple Alliance.
The alliance was formed in the context of a Europe that was becoming an armed camp, with two rival alliances forming. On the one side was the Triple Entente of Britain, France, and Russia, and on the other, the Central Powers of Germany, Austria-Hungary, Bulgaria, and the Ottoman Empire.
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The pact was a defensive alliance against Russia
The unification of Germany as a nation-state under Bismarck in 1871 had disrupted the old 'balance of power' in Europe. In the same year, Russia defeated the Ottoman Empire in the Russo-Turkish War, and the resulting Treaty of San Stefano gave Russia considerable influence in the Balkans, angering Austria-Hungary, which was Russia's chief rival in the region. In 1878, Bismarck called an international conference (the Congress of Berlin) to address the issue. The Treaty of Berlin reversed Russia's gains and provided the Austrians with compensation in the form of Bosnia.
Following this, on October 7, 1879, Germany and Austria-Hungary formed the Dual Alliance, a defensive pact against Russia. The two powers promised each other support in the event of an attack by Russia and neutrality in the event of aggression by any other power (generally taken to be France). Bismarck saw the alliance as a way to prevent German isolation and preserve peace, as Russia would not dare to wage war against both empires. The addition of Italy in 1882 transformed the alliance into the Triple Alliance. The agreement remained an important element of both German and Austro-Hungarian foreign policy until 1918.
The alliance between Germany and Austria-Hungary was surprising at the time, given that they were two very unequally matched 'brothers' with differing goals and sometimes even rivalry. Vienna and Berlin had a so-called 'brotherhood in arms', but in reality, Austria often overestimated Germany's potential, and Germany underestimated the strength of the old Habsburg Monarchy. This became evident in August 1914, when Austria announced that it would take 14 days for its army to get ready for war, as most of its soldiers were on furlough for the harvest.
In the years leading up to World War I, a dangerous rift arose between Russia and Austria-Hungary, with conflicting ambitions in South-Eastern Europe. Austria-Hungary wanted to crush Serbia, and Russia supported Serbia during the 1914 crisis, fearing the loss of its status as a 'Great Power' if it backed down. In 1914, the assassination of Archduke Franz Ferdinand, the heir to the Austro-Hungarian throne, by a Serbian-backed terrorist, was a key trigger for the war.
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The alliance was part of Germany's system of alliances to prevent war
The unification of Germany as a nation state under Chancellor Otto von Bismarck in 1871 disrupted the old 'balance of power' in Europe. In the years that followed, Bismarck sought to portray Germany as a peacemaker and preserve the European status quo to gain more power for the German Empire and unify Germany. In 1878, Russia's victory over the Ottoman Empire in the Russo-Turkish War and the resulting Treaty of San Stefano outraged Austria-Hungary, Russia's chief rival in the Balkan region. In response, Bismarck called the Congress of Berlin, which resulted in the Treaty of Berlin that reversed Russia's gains and provided compensation to Austria in the form of Bosnia.
However, tensions in Europe continued to rise, and on October 7, 1879, Germany and Austria-Hungary formed the Dual Alliance, a defensive pact in which they promised each other support in the event of an attack by Russia and neutrality in the face of aggression by other powers. Bismarck viewed this alliance as a way to prevent Germany's isolation and preserve peace, as Russia was unlikely to wage war against both empires. The addition of Italy in 1882 transformed the Dual Alliance into the Triple Alliance. This agreement remained a key element of German and Austro-Hungarian foreign policy until 1918, contributing to the complex network of alliances that characterised pre-World War I Europe.
The alliance between Germany and Austria-Hungary, however, was not without its challenges. Despite their alliance, Germany and Austria-Hungary had differing aims and were sometimes rivals. Austria-Hungary's focus was on Serbia and the Balkans, while Germany was principally concerned with the conflict with France. This divergence in interests and the lack of concrete agreements regarding war aims created tensions between the two allies. Additionally, Austria-Hungary's struggles with general mobilisation and supply chain issues during the war further highlighted the disparities between the two powers.
In the lead-up to World War I, the formation of rival alliances, including the Triple Entente between France, Britain, and Russia, and the growing strength of Germany's pursuit of 'world power' status, contributed to the complex and volatile political landscape in Europe. By August 1914, the military and political leadership of Germany recognised the urgency of achieving their vision of Germany's destiny, ultimately leading to the outbreak of World War I.
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Austria-Hungary and Germany had differing aims and were sometimes rivals
On October 7, 1879, Austria-Hungary and the German Empire formed the Dual Alliance, a defensive pact in which both powers promised each other support in the event of an attack by Russia and neutrality in the event of aggression by any other power. This treaty was part of German Chancellor Otto von Bismarck's plan to prevent Germany's isolation and portray it as a peacemaker and preserver of the European status quo.
However, despite their alliance, Austria-Hungary and Germany had differing aims and were sometimes rivals. The 'brotherhood in arms' between Vienna and Berlin was, in reality, an unequal alliance. Since the Austrian elites were defeated by the Prussians in 1866, they had lost their self-confidence and struggled to accept their loss of hegemony in the German-speaking world. In Bismarck's vision for Germany as a great power, the Habsburg Monarchy was only a junior partner. The rise of the unified German Empire from 1871 onwards was viewed ambivalently in Vienna, with a mix of admiration for Prussian militarism and erosion of Austrian self-respect due to their diminished status.
This dynamic played out in the lead-up to World War I. In July 1914, as the signs of impending war became clear, the divergent aims and lack of concrete agreements between Austria-Hungary and Germany were exposed. While the Danube Monarchy focused on Serbia and the Balkans, Germany's attention was primarily directed towards the conflict with France. Astonishingly little military-strategic cooperation existed between the two allies on the eve of the war, and their interactions were more suggestive of rivalry than brotherhood. The respective military staffs operated in secrecy, sharing as little access as possible to their strategic and logistic affairs.
The power imbalance and differing aims continued into the war. When the Austrian General Staff announced in August 1914 that it would take fourteen days for their army to mobilize due to agricultural furloughs, it surprised the German Supreme Command. As the war progressed, the Austrian army faced massive problems with supplies and reinforcements, becoming increasingly dependent on German assistance.
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The alliance ended in 1918
The alliance between Austria-Hungary and the German Empire, known as the Dual Alliance, was formed on October 7, 1879, through a treaty. The pact was initially intended to last for five years, but it remained an important element of German and Austro-Hungarian foreign policy until 1918.
The alliance was established as part of German Chancellor Otto von Bismarck's system of alliances to prevent or limit war and to portray Germany as a peacemaker and preserver of the European status quo. In the treaty, both powers promised each other support in the event of an attack by Russia and neutrality in the event of aggression by another power, which was generally assumed to be France. This alliance was significant as it helped prevent Russia from waging war against either empire and served as a strategy to avoid Germany's isolation.
However, the alliance between Austria-Hungary and Germany ended in 1918, coinciding with the end of World War I. The alliance's termination resulted from a combination of factors, including the divergent aims and rivalries between the two nations, Austria-Hungary's reliance on German forces during the war, and the entry of the United States into the war on the side of the Entente in 1917, which marked a decisive turning point leading to the military collapse of the Central Powers.
In the lead-up to World War I, tensions arose between Austria-Hungary and Germany due to differing strategic priorities and a lack of concrete agreements regarding their war objectives. Austria-Hungary focused on Serbia and the Balkans, while Germany prioritized the conflict with France. Additionally, Austria-Hungary faced challenges with general mobilization and supply chain issues during the war, further straining the alliance.
The end of the alliance in 1918 signaled a shift in the geopolitical landscape, as the Central Powers, which included Germany and Austria-Hungary, suffered a military collapse and were unable to continue the war. This ultimately led to the armistice that came into effect on November 11, 1918, bringing an end to the war in Western Europe.
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Frequently asked questions
Austria-Hungary and the German Empire formed the Dual Alliance on October 7, 1879.
The two powers promised each other support in the event of an attack by Russia and neutrality in the event of aggression by another power. German Chancellor Otto von Bismarck wanted to prevent the isolation of Germany and preserve peace.
The alliance was significant as it was one of the more surprising alliances of its time. It also played a role in the lead-up to World War I, with Austria-Hungary and Germany on one side and France, Britain, and Russia forming the Triple Entente on the other.
The treaty was to be kept secret and only communicated to a third power with the joint understanding of both parties. The duration of the treaty was provisionally fixed at five years, with the option to renew or modify it thereafter.
The alliance remained an important element of German and Austro-Hungarian foreign policy until 1918. It also contributed to the complex network of alliances and rivalries that dominated European politics in the years leading up to World War I.










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