On New Year's Day 1942, President Roosevelt, Prime Minister Churchill, Maxim Litvinov, of the USSR, and T. V. Soong, of the Republic of China, signed a short document, based on the Atlantic Charter and the London Declaration,[12][13] which later came to be known as the United Nations Declaration. The next day the representatives of twenty-two other nations added their signatures."[14] The term United Nations was first officially used when 26 governments signed this Declaration. By 1 March 1945, 21 additional states had signed. "Four Powers" was coined to refer to the four major Allied countries: the United States, the United Kingdom, the Soviet Union and the Republic of China.[16] and became the foundation of an executive branch of the United Nations, the Security Council.