Nearly 3 million Soviet POWs in German captivity were murdered in just eight months of 1941–42. Although the Wehrmacht had considerable early success, their attack was halted in the Battle of Moscow. Subsequently, the Germans were dealt major defeats first at the Battle of Stalingrad in the winter of 1942–43, and then in the Battle of Kursk in the summer of 1943. Another German failure was the Siege of Leningrad, in which the city was fully blockaded on land between 1941 and 1944 by German and Finnish forces, and suffered starvation and more than a million deaths, but never surrendered. Under Stalin's administration and the leadership of such commanders as Georgy Zhukov and Konstantin Rokossovsky, Soviet forces steamrolled through Eastern and Central Europe in 1944–45 and captured Berlin in May 1945. In August 1945, the Soviet Army ousted the Japanese from China's Manchukuo and North Korea, contributing to the Allied victory over Japan.