On April 27, 1954, the Conference produced a declaration which supported the territorial integrity and sovereignty of Indochina. In addition, the Conference declaration agreed upon the cessation of hostilities and the introduction of foreign involvement (or troops) in internal Indochina affairs. Northern and southern zones were drawn into which opposing troops were to withdraw, to facilitate the cessation of hostilities between the Vietnamese forces and those that had supported the French. Viet Minh units, having advanced to the far south while fighting the French, retreated from these positions, in accordance with the Agreement, to north of the ceasefire line, awaiting unification on the basis of internationally supervised free elections to be held in July 1956. Most of the French Union forces evacuated Vietnam, although much of the regional governmental infrastructure in the South was the same as it had been under the French administration. An International Control Commission was set up to oversee the implementation of the Geneva Accords, but it was essentially powerless to ensure compliance. It was to consist of India, Canada, and Poland. The agreement was among Cambodia, the Democratic Republic of Vietnam, France, Laos, the People's Republic of China, the State of Vietnam, the Soviet Union, and the United Kingdom. The United States took note and acknowledged that the agreement existed, but refused to sign the agreement, to avoid being legally bound to it. The U.S. government undertook to build a separate anticommunist state in South Vietnam and in 1956 supported South Vietnam’s refusal to hold nationwide elections in consultation with North Vietnam.