Discusses Maryland's role in the colonization movement. 4. The Civil War, Emancipation and Reconstruction Blassingame, John W. March, 1963. "The Recruitment of Negro Troops in Maryland." Maryland Historical Magazine 58. An account of the successful effort to recruit Maryland blacks into the Union Army. Callcott, Margaret Law. 1969. The Negro in Maryland Politics 1870-1912. Baltimore: Johns Hopkins Press. Discusses the high level of Negro voting participation in Post-Civil War Maryland and the effort to disenfranchise Blacks at the turn of the 20th century.