Austro-Serbian War (Pax Europaea)

The Austro-Serbian War, also known as the War of 1914 or the Third Balkan War, was a short-lived military conflict between the Austro-Hungarian Empire and the Kingdom of Serbia. The cause of the war was the assassination of Archduke Franz Ferdinand of Austria by an ethnic Serb nationalist from Bosnia. On 28 July 1914, Austro-Hungarian forces invade Serbia. Serbia fought hopelessly alone, despite Russian promises of intervention. By September, Austro-Hungarian forces sacked Belgrade and the Serbian government surrendered. Although winning the war, Austria-Hungary gained no territory but a puppet government was established in Serbia.