His death helped inspire the Selma to Montgomery marches in March 1965, a major event in the civil rights movement that helped gain congressional passage of the Voting Rights Act of 1965. This opened the door to millions of African Americans being able to vote again in Alabama and across the Southern United States, regaining participation as citizens in the political system for the first time since the turn of the 20th century. Most had been disenfranchised since then by state constitutions and discriminatory practices that made voter registration and voting more difficult.