Marcena A. Phelps participated in the Civil Rights Movement in Mississippi from 1960-1967. She was a member of the NAACP and SCLC. She helped register people to vote and assisted the freedom riders. When local churches used for meetings were threatened, Phelps’s home was used to hold NAACP meetings. She attended the National Democratic Convention in Philadelphia as a Mississippi representative. She currently resides in Vicksburg.