Following the Russian Revolution, Georgi Zhukov rose to become Stalin's deputy in the war against Hitler. Thorough and innovative, he was a single-minded soldier whose abilities helped turn the war around. The Battle of Berlin that finally destroyed the Nazi regime was Zhukov's ultimate triumph. There is no more difficult military objective than a major city. Zhukov's success in taking Berlin has led him to be called the greatest commander of the 20th century.