Reza Shah was deposed in 1941 by an invasion of allied British and Soviet troops who believed him to be sympathetic with the allies' enemy Nazi Germany. His son, Mohammad Reza Pahlavi was installed by the allies as monarch. Prince Pahlavi (later crowned shah) reigned until the 1979 revolution with one brief interruption. In 1953 he fled the country after a power-struggle with his Prime Minister Mohammad Mossadegh. Mossadegh is remembered in Iran for having been voted into power through a democratic election, nationalizing Iran's British-owned oil fields, and being deposed in a military coup d'état organized by an American CIA operative and aided by the British MI6. Thus foreign powers were involved in both the installation and restoration of Shah Mohammad Reza Pahlavi.