text: The Serbians were set up in defensive positions against the Austro-Hungarians. The first attack came on 16 August, between parts of the 21st Austro-Hungarian division and parts of the Serbian Combined division. In harsh night-time fighting, the battle ebbed and flowed, until the Serbian line was rallied under the leadership of Stepa Stepanovic. Three days later the Austrians retreated across the Danube, having suffered 21,000 casualties against 16,000 Serbian casualties. This marked the first Allied victory of the war. The Austrians had not achieved their main goal of eliminating Serbia. In the next couple of months the two armies fought large battles at Drina (6 September to 11 November) and at Kolubara from 16 November to 15 December.
  In the autumn, with many Austro-Hungarians tied up in heavy fighting with Serbia, Russia was able to make huge inroads into Austria-Hungary capturing Galicia and destroying much of the Empire's fighting ability. It wasn't until October 1915 with a lot of German, Bulgarian, and Turkish assistance that Serbia was finally occupied, although the weakened Serbian army retreated to Corfu with Italian assistance and continued to fight against the central powers.
  Yugoslav Committee, a political interest group formed by South Slavs from Austria-Hungary during World War I, aimed at joining the existing south Slavic nations in an independent state. From this plan, a new kingdom eventually was born: The Kingdom of Serbs, Croats and Slovenians.