Italy became a co-belligerent of the Allies, and the Italian Co-Belligerent Army was created to fight against the German occupation of Northern Italy, where German paratroopers rescued Mussolini from arrest and he was placed in charge of a German puppet state known as the Italian Social Republic (RSI). Italy descended into civil war until the end of hostilities after his deposition and arrest, with Fascists loyal to him allying with German forces and helping them against the Italian armistice government and partisans.