The Battle of Kolubara, was fought between Austria-Hungary and Serbia in November and December 1914, during which campaign of World War I was fought from late July 1914, when Austria-Hungary invaded the Kingdom of Serbia at the outset of World War I, until the war's conclusion in November 1918?
Serbian Campaign of World War I The Serbian Campaign of World War I was fought from late July 1914, when Austria-Hungary invaded the Kingdom of Serbia at the outset of World War I, until the war's conclusion in November 1918. The front ranged from the Danube River to southern Macedonia and back north again, and it drew in forces from almost all the combatants of the war.
Hungarian Republic (1919–20) The Hungarian Republic (Hungarian: "Magyar Köztársaság" ) was a short-lived republic that existed between August 1919 and February 1920 in the central and western portions of the former Hungarian Kingdom (encompassing most of present-day Hungary and parts of Austria, Slovakia and Slovenia). The state was established in the aftermath of the Hungarian Revolutions of 1918–1919 by counter-revolutionary forces who sought to return to the status quo prior to 31 October 1918.