Who were the first 3 republics to leave the USSR and declare independence were?

The first three republics to leave the USSR and declare independence were Lithuania, Latvia, and Estonia. Lithuania was the first to declare independence on March 11, 1990, followed by Latvia on May 4, 1990, and Estonia on August 20, 1991. These declarations were significant steps in the dissolution of the Soviet Union, which officially ended later that year in December.