Brezhnev privately warns Carter over Iran

Iran and the USSR signed a long-term commodity-turnover agreement, reinforcing the commercial side of their rapprochement.

Iran and the USSR signed an agreement on developing economic and technical cooperation, broadening the framework for joint projects.

The first stage of the Soviet-assisted Isfahan steelworks was officially inaugurated in Kosygin’s presence, giving Iran a major symbol of industrial development.

Iran and the USSR signed an agreement on cooperation to prevent the hijacking of civilian aircraft, adding a security instrument to their bilateral relationship.

Soviet pilot Valentin Zosimov flew an An-2 aircraft into Iran, prompting Moscow to demand the return of the pilot and plane and confronting Tehran with an asylum dispute.

A statement published in Pravda warned that foreign interference, especially military intervention in Iran, would affect Soviet security interests.

The monarchy’s remaining authority collapsed in Iran. Soviet diplomacy now faced a revolutionary leadership seeking independence from both Cold War blocs.

Islamist students seized the US embassy in Tehran. The confrontation with Washington altered Iran’s international position; Tudeh welcomed the seizure as an anti-imperialist victory.

The Security Council unanimously adopted resolution 457 demanding the release of US embassy personnel, with the USSR participating in the unanimous vote.

Large-scale Soviet airborne deployments began in Afghanistan. The intervention near Iran’s eastern frontier became a major source of tension with Tehran.