War Department Adjutant General's Office Washington, July 23, 1863
General Orders No. 226
The County of St. Mary's, Md., is detached from the Middle Department, and will form a separate Military District. Brigadier General G. Marston is assigned to the command of St. Mary's District; Headquarters at Point Lookout.
By Order Of The Secretary Of War: E.D. TOWNSEND Assistant Adjutant General
Light age toning. Very fine.
Trivia: St. Mary's County is where Francis Scott Key, the author of a poem which became The Star Spangled Banner, grew up.
Over 600 African Americans from St. Mary's County served in the Union Army during the Civil War; two were awarded the Medal of Honor.