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Reza Shah Pahlavi (15 March 1878 – 26 July 1944), commonly known as Reza Shah, was the Shah of Iran from 15 December 1925 until he was forced to abdicate by the Anglo-Soviet invasion of Iran on 16 September 1941. Two years after the 1921 Persian coup d'état, led by Zia'eddin Tabatabaee, Reza Pahlavi became Iran's prime minister.