Iran hostage crisis
Fifty-two United States diplomats and citizens were held hostage after a group of militarized Iranian college students belonging to the Muslim Student Followers of the Imam's Line, who supported the Iranian Revolution, took over the U.S. Embassy in Tehran and seized hostages. A diplomatic standoff ensued. The hostages were held for 444 days from November 4, 1979, to January 20, 1981.