Political map of Russia & the former Soviet Union 16 May 1946 (Iran Crisis): During the Second World War (World War II), Britain and the Soviet Union had occupied Iran (Anglo-Soviet invasion of Iran). With the war over, the United States demanded that the Russians withdraw (Iran crisis of 1946). Under pressure (United Nations Security Council Resolution 2) from the newly formed United Nations (United Nations), Stalin (Joseph Stalin) finally backed down, but tried to retain influence by forcing Iran to agree to oil concessions and to accept Soviet backed Azerbaijani (Azerbaijan People%27s Government) and Kurdish regimes (Republic of Mahabad) in the north. However, the Iranian government revoked these deals as soon as the Soviet troops left.