Sentence:  He was brigadier of the club 's locker-room light infantry , and at one time or another declared war on Russia , Czechoslovakia , <WSD>Yugoslavia</WSD> , and China . 
Meaning of the word marked with <WSD> tags:  a mountainous republic in southeastern Europe bordering on the Adriatic Sea; formed from two of the six republics that made up Yugoslavia until 1992; Serbia and Montenegro were known as the Federal Republic of Yugoslavia until 2003 when they adopted the name of the Union of Serbia and Montenegro