Prior to 1991, Ukraine was part of the Soviet Union and had Soviet nuclear weapons in its territory. On December 1, 1991, Ukraine, the second most powerful republic in the Soviet Union (USSR), voted overwhelmingly for independence, which ended any realistic chance of the Soviet Union staying together even on a limited scale. More than 90% of the electorate expressed their support for Ukraine's declaration of independence, and they elected the chairman of the parliament, Leonid Kravchuk, as the first president of the country. At the meetings in Brest, Belarus on December 8, and in Alma Ata on December 21, the leaders of Belarus, Russia, and Ukraine formally dissolved the Soviet Union and formed the Commonwealth of Independent States (CIS).