What happened on this land around c. 1930–1938 CE (Pahlavi reforms and international context)?

State modernization, strained neutrality during WWII, Allied occupation and dynastic change (Reza Shah abdicates in 1941)
Rulers
Reza Shah Pahlavi (then Mohammad Reza after 1941)
Reza Shah 1925–1941
Modernization, secularization and centralization of the Iranian state.
Battles
Strategic pressures and occupation (1941)
1939–1945 (WWII era)
Allied occupation in 1941 forces Reza Shah's abdication (context extends from 1939–1945 geopolitical developments)