During the First Indochina War, the Indochinese Communist Party formed the Pathet Lao independence organisation. The Pathet Lao began a war against the French colonial forces with the aid of the Vietnamese independence organisation, the Viet Minh. In 1950, the French were forced to give Laos semi-autonomy as an "associated state" within the French Union. France remained in de facto control until 22 October 1953, when Laos gained full independence as a constitutional monarchy.