The Act of the Re-Establishment of the State of Lithuania or Act of March 11 was an independence declaration by the Lithuanian Soviet Socialist Republic adopted on March 11, 1990, signed by all members of the Supreme Council of the Republic of Lithuania led by Sajudis. The act emphasized restoration and legal continuity of the interwar-period Lithuania, which was occupied by the USSR and lost independence in June 1940. It was the first time that a Union Republic declared independence from the dissolving Soviet Union.