In the early days of the United Nations, the Soviet Union was responsible for almost all of the vetoes. Because of their frequent vetoes, Soviet ambassador Andrei Gromyko earned the nickname Mr. Nyet and Vyacheslav Molotov was known as Mr. Veto. Molotov regularly vetoed the admission of new members to counter the US refusal to admit members of the Eastern Bloc. The impasse was finally resolved on 14 December 1955 when 16 countries from the Western and Eastern Blocs were simultaneously admitted to the UN.