Mohammed Reza Shah’s rule of Iran spanned eight U.S. presidents. His desire for military supremacy over his neighbours and his distrust of the Soviets led him to seek a military relationship with the US following the end of the Second World War. As the U.S.-Iranian relationship developed, the idea of arming Iran came to form a key component of U.S. policy due to waning U.S. options in the Gulf through the 1960s and an alignment in U.S. and Iranian regional policies in the early 1970s. This relationship eventually resulted in Iran wielding a military that was, on paper, within reach of becoming the world’s fifth-most-advanced force in 1978.
McGlinchey, S. (2013). How the Shah entangled America. National Interest,