The joint U.S. - British operation ended Iran 's drive to assert sovereign control over its own resources .
The joint U.S. - British operation helped put an end to a vibrant chapter in the history of the country 's nationalist and democratic movements .
The joint U.S. - 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 .