President Lyndon B. Johnson signed the Voting Rights Act of 1965 into law on August 6, 1965, prohibiting racial discrimination in voting. The legislation followed the Selma to Montgomery marches, including the March 7, 1965 incident when state troopers attacked civil rights protesters. The act banned literacy tests, authorized federal oversight of voter registration in areas with histories of discrimination, and permitted federal officials to register voters in areas with significant disenfranchisement. The law substantially increased voter registration among minority citizens.