What was the name of the 1964 campaign to register Black voters in Mississippi?

The 1964 campaign to register Black voters in Mississippi was called Freedom Summer.

Organized by civil rights groups including the Congress of Racial Equality, the Student Nonviolent Coordinating Committee, and the Council of Federated Organizations, Freedom Summer brought hundreds of mostly young volunteers to Mississippi. They worked on voter registration, education, and community organizing.

Mississippi’s officials and white supremacists used intimidation, arrests, violence, and economic retaliation to block Black political participation. Three civil rights workers—James Chaney, Andrew Goodman, and Michael Schwerner—disappeared in June 1964 and were later found murdered.

Freedom Summer did not immediately achieve large-scale Black voter registration, but it drew national attention to disenfranchisement. Its organizing helped spur passage of the Voting Rights Act of 1965.