Russia Leaves the War (1956) is a Pulitzer Prize-winning book by George F. Kennan. The book also won the National Book Award for Nonfiction, the George Bancroft Prize, and the Francis Parkman Prize. The first of two volumes discussing Soviet-American relations from 1917-1920, Russia Leaves the War covers the revolution of 1917 and the departure of Russia from World War I in 1918. The second volume, The Decision to Intervene, explores U.S. involvement in Siberia.