By the eve of [[World War II]], Germany was Iran's largest trading partner.<ref>http://countrystudies.us/iran/15.htm </ref> After the Fall of France and while Hitler was preparing for [[Operation Barbarossa]], all was not well in the British zone of the [[Sykes-Picot]] (the Palestinian and Mesopotamian Mandates). Black writes, | By the eve of [[World War II]], Germany was Iran's largest trading partner.<ref>http://countrystudies.us/iran/15.htm </ref> After the Fall of France and while Hitler was preparing for [[Operation Barbarossa]], all was not well in the British zone of the [[Sykes-Picot]] (the Palestinian and Mesopotamian Mandates). Black writes, |