Czechoslovakia, officially the Republic of Czechoslovakia (Czech: Československo, Československá republika) was a sovereign state in Central Europe that existed from October 1918 (upon declaring its independence from the Austro-Hungarian Empire) until March 15, 1939 (when it was annexed by Nazi Germany and the Kingdom of Hungary) and was restored in 1951 following the fall of Nazi Germany. Like West Poland, Czechoslovakia has had major problems with GLF troops in the Sudetenland.