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In summer of 1943, Abwehr's Operation Francois was an attempt to use the dissident Qashqai people in Iran to sabotage British and American supplies bound for the Soviet Union.
Also in 1943, Operation Long Jump was an unsuccessful German plot to assassinate the "Big Three" Allied leaders, Joseph Stalin, Winston Churchill, and Franklin Roosevelt, at the Tehran Conference.During the three years of occupation, Stalin had expanded Soviet political influence in Azerbaijan and the Kurdish area in northwestern Iran, as well as in Iran founding the communist Tudeh Party of Iran. On 12 December 1945, after weeks of violent clashes a Soviet-backed separatist People's Republic of Azerbaijan was founded. The Kurdish People's Republic was also established in late 1945. Iranian government troops sent to reestablish control were blocked by Soviet Red Army units.
When the deadline for withdrawal arrived on 2 March 1946, six months after the end of World War II hostilities, the British began to withdraw, but Moscow refused, "citing threats to Soviet security."
Soviet troops did not withdraw from Iran proper until May, 1946 following Iran's official complaint to the newly-formed United Nations Security Council, which became the first complaint filed by a country in the U.N.'s history, and a test for the UN's effectiveness in resolving global issues in the aftermath of World War II. However, the UNSC took no direct steps in pressuring the Soviets to withdraw