Eleven Months' War

The Eleven Months' War was a major revolution against the Axis Powers (chiefly Germany) in Nazi-occupied Yugoslavia during World War Two that lasted from June 7th 1943 to May 28th 1944. The revolution was led by communist revolutionary Josip Broz Tito, and is recognized Europe's most effective resistance during the global conflict. 
It is estimated that over a million Yugoslavs were active in the conflict, with over 150,000 dead. The war has ended with a Yugoslav victory, forming the Yugoslav Socialist Republic that fought until the end of World War Two.