How did the seizure of the u. s. embassy by iranian students affect u. s. cold war policy

The crisis of hostages at the American embassy in Tehran was the worst foreign policy crisis of president Jimmy Carter.  66 American diplomats and citizens were held as hostages by Iranian revolutionary militants. The Iranian Islamic revolution was young then. Hostages were kept in custody by the kidnappers for over a year. The US government and other diplomatic allies attempted to negotiate with the Iranians but to no avail. The US administration froze Iranian assets in the US, stopped buying oil from Iran and launched a diplomatic offensive. The crisis was a PR disaster for a president that was looking for reelection. Carter sent  a rescue mission that failed due to poor planning.  The issue poisoned Iranian-American relations for decades. The crisis contributed to a hardening of US Cold War policies and a conservative turn in politics, all expressed in the election of Ronald Reagan as president on November 4, 1980.

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