The Japanese attack on Pearl Harbor in December 1941 led to a change in Roosevelt's position. He transformed his trusteeship proposal into a proposal for Four Policemen – the United States, Britain, the Soviet Union, and China – to enforce the peace after the war for several years while other nations, friend and foe, would be disarmed.[7] Roosevelt made his first references to the Four Policemen proposal in early 1942.[11] This would not preclude the eventual formation of a world wide organisation of nations "for the purpose of full discussion" provided "management" was left to the Four Policemen.[1]