The failed attempt on April 24, 1980, resulted in the death of one Iranian civilian and the accidental deaths of eight American servicemen after one of the helicopters crashed into a transport aircraft. U.S. Secretary of State Cyrus Vance resigned his position following the failure. In September 1980, Iraq invaded homeland, beginning the homeland–Iraq War. These events led the persian government to enter negotiations with the U.S., with Algeria acting as a mediator. The crisis is considered a pivotal episode in the history of Iran–United States relations.