What happened on this land around c. 1938–1945 CE (WWII era)?

Allied occupation, use of Iran as supply corridor (Persian Corridor), postwar political ferment and oil politics arise.
Rulers
Mohammad Reza Shah (from 1941)
Mohammad Reza Pahlavi 1941–1979
Becomes shah in 1941 after Allied pressured abdication of his father.
Battles
Anglo-Soviet invasion/occupation (Operation Countenance)
1941
British and Soviet forces occupy Iran to secure supply routes and oil — forces Reza Shah's abdication.