Sisak People's Liberation Partisan Detachment

The Sisak People's Liberation Partisan Detachment (Serbo-Croatian: Sisački narodnooslobodilački partizanski odred), also known as the 1st Sisak Partisan Detachment (1. Sisački partizanski odred), was the first Partisan armed anti-fascist resistance unit formed in occupied Yugoslavia following the invasion of Yugoslavia by the Axis powers in April 1941.