Postcard depicting a Serbian soldier on top of a fallen Austro-Hungarian soldier, 1914. Today 108 years ago, on August 15, 1914, the Battle of the Cer began on the Serbian Front, resulting in the first major Allied victory in the First World War. On July 28, 1914, Austria-Hungary declared war on Serbia. The following day, the Austro-Hungarians began launching several artillery strikes into Serbia. The Serbs, vastly outnumbered in terms of rifles, artillery, ammunitions and troops, withdrew from the borders to Šumadija where they could rapidly move their forces either north or west depending on where the Austro-Hungarians attacked. On August 12, the Austro-Hungarians invaded Serbia from the western border, crossing the Drina river and quickly seizing the the peak of the Cer mountain. Then at 11 PM on August 15, the Serbs assembled a larger force and counter-attacked the Cer mountain. The mountain was lightly defended and the Serbs quickly conquered it, but fierce and bloody fightin...