The '28 Mordad' coup, as it is known by its Persian date the Solar Hijri calendar, was a watershed for Iran, for the Middle East and for the standing of the United States in the region. The joint US-British operation ended Iran's drive to assert sovereign control over its own resources and helped put an end to a vibrant chapter in the history of the country's nationalist and democratic movements. These consequences resonated with dramatic effect in later years. When the Shah finally fell in 1979, memories of the US intervention in 1953, which made possible the monarch's subsequent, and increasingly unpopular, 25-year reign intensified the anti-American character of the revolution in the minds of many Iranians.Quoting from Gasiorowski and Byrne, "Mohammad Mosaddeq and the 1953 Coup in Iran".</ref>