I believe you’re referring to operation Ajax? The Dulles brothers spearheaded that op, plotting  one party against the other. The whole thing came into being because BP (British Petroleum) promised the people of Iran everything, and gave them nothing. They created a huge mess, and called on the C_A to bail them out. Thus, losing a controlling interest in their own oil company in the deal. That matters little, since they got their company back, just to sell it again to Russia.  But, Allen Dulles was a scum shit from hell. He was one of the main orchestrators of 11/22/1963. May he rot in hell.