Occupation of Iran in World War 2

In September 1939, German forces crossed the border into Poland, crushing the Poles in a fortnight.  The news was received with dismay by the royal family in Iran, who knew that the war could only do Iran harm.  There were several reasons for this, most notably the British blockade that cut Iran off from its German suppliers and, worse, the secret treaty between Hitler and Stalin, which placed Iran into the Soviet section of the world.