Belgrade was bombed by the Allies on 16 April 1944, killing about 1,100 people. This bombing fell on the Orthodox Christian Easter. Most of the city remained under German occupation until 20 October 1944, when it was liberated by the Red Army and the Communist Yugoslav Partisans. On 29 November 1945, Marshal Josip Broz Tito proclaimed the Federal People's Republic of Yugoslavia in Belgrade (later to be renamed to Socialist Federal Republic of Yugoslavia on 7 April 1963).