Reza Shah had declared neutrality in World War II , and tried to balance between the two major powers , Britain and Nazi Germany .
In 1941 , after the Nazi invasion of the USSR , the British and Commonwealth of Nations forces and the Red Army invaded Iran .
Reza Shah had declared neutrality in World War II , and tried to balance between the two major powers , British and Nazi Germany .
In 1941 , after the Nazi invasion of the USSR , the British and Commonwealth of Nations forces and the Red Army invaded Iran .