Yep, the Soviet player I play against ALWAYS activates Iran and tries a push into North Africa. It’s a good move and two infantry help a little. The move also forces the Axis to move into the Middle East to deal with the Russian threat as opposed to just dealing with the UK/ Free French forces in Africa.
Of course, 9 times out of 10, the Axis is moving in that direction anyway, but Russians in Iran make things a bit more difficult.