In 1963 and 1964, civil rights groups in Selma, Alabama had been trying to sign African-American people up to vote, but they had not been able to. At the time, 99% of the people signed up to vote in Selma were white. However, the government workers who signed up voters were all white. They refused to sign up African-Americans. In January 1965, these civil rights groups asked King and the SCLC to help them. Together, they started working on voting rights. However, the next month, an African-American man named Jimmie Lee Jackson was shot by a police officer during a peaceful march. Jackson died. Many African-American people were very angry.