After it became clear that the Soviet Red Army was going to push the Nazis out of eastern and central Europe, an anti-Nazi resistance movement launched a fierce armed insurrection, known as the Slovak National Uprising, near the end of summer 1944. A bloody German occupation and a guerilla war followed. Germans and their local collaborators completely destroyed 93 villages and massacred thousands of civilians, often hundreds at a time. The territory of Slovakia was liberated by Soviet and Romanian forces by the end of April 1945.