Serbian campaign

Campaign during World War I

The Serbian campaign was a series of military expeditions launched in 1914 and 1915 by the Central Powers against the Kingdom of Serbia during World War I. After an unsuccessful invasion by Austria-Hungary in 1914, the Central Powers launched a successful invasion in 1915 and occupied Serbia. In 1918, after breaking the front in Macedonia, Serbia and its allies liberated Serbia. The first campaign began after Austria-Hungary declared war on Serbia on 28 July 1914.

From Wikipedia, under CC BY-SA. More on occurri.