U.S.-Iran relations refer to the diplomatic, political, and military interactions between the United States and Iran, particularly since the 20th century. This relationship became especially complicated after the Iranian Revolution in 1979, which led to the overthrow of the pro-American Shah and the establishment of an Islamic Republic. The dynamics of this relationship were significantly influenced by events such as the Camp David Accords, which reshaped Middle Eastern politics, and the Iran Hostage Crisis, marking a pivotal moment in U.S. foreign policy.