Tudeh Party Arrests: There were many arrests of the large Tudeh Party of Iran. the Tudeh Party was a communist party, so the arrest show the United States influence and their desire to prevent communism.
Khosrow Roozbeh Execution: This person was a national hero of the Tudeh Party of Iran. He was betrayed and turned over to police. He remained dedicated to the party until he was killed.
The British Halt Oil Production: This was a reponse to the idea of "nationalization" of Iranian oil in order to so Iran that they "need them" The didn't start production again until the overthrow of the current government "Coup d' etat."
Iran Contra Affair: America made money for dealing arms in Iran, and used the money to fund the support of the Contras in Nicaragua. They were fighting against the Sandinistas.
Iran Crisis: The Soviets refused to give up the land in aquired during WW2 in fear of losing their world power. During, the crisis, the United States tried to force the Soviets out of Iran.