The Voting Rights Act of 1965 is a landmark piece of federal legislation in the United States that prohibits racial discrimination in voting. It was signed into law by President Lyndon B. Johnson during the height of the American Civil Rights Movement on August 6, 1965, and Congress later amended the Act five times to expand its protections. Designed to enforce the voting rights guaranteed by the Fourteenth and Fifteenth Amendments to the United States Constitution, the Act resulted in the mass enfranchisement of racial minorities throughout the country, especially in the South. According to the U.S. Department of Justice, the Act is considered to be the most effective piece of civil rights legislation ever enacted in the country.