In 1952, after serving in the Army, Reverend Donald M. Clark moved to Las Vegas, Nevada where he became an assistant pastor and began working towards integration and improving the lives of the black community. His firm stance on equal rights led him to the National Association for the Advancement of Colored People (NAACP), where he worked with James McMillan and Charles West to lobby Nevada Governor Grant Sawyer and other public figures to initiate integration in Las Vegas.