On August 1, 1944, the Polish resistance Home Army launched a sudden and well-coordinated attack against the German occupiers of Warsaw. Taken by surprise, the Germans initially fell back; and at one point, the Home Army gained control of most of Central Warsaw. Success of this audacious campaign was dependent on two important premises: 1) That the Allied Nations would support their efforts with air and ground forces; and 2) That the Soviet Army, which was rapidly approaching the outskirts of Warsaw, would join the fight, thus overwhelming the defending German forces. But unknown to the London-based Polish government in exile, Poland’s future had already been decided by Roosevelt, Churchill, and Stalin at Yalta; thus, neither occurred, and the Poles were left to fight alone. Out manned and outgunned, the Home Army fought on for 63 days with little or no outside help before surrendering to the German forces.