(A) Baltimore MD
(B) Richmond VA
(C) ** Washington DC
EXPLANATIONS BELOW
Concept note-1: -Situated in the midst of the Eastern Theatre of war and sandwiched between two slave states, Washington, DC, held tremendous strategic, political, and moral significance for both the Union and the Confederacy.
Concept note-2: -Washington: Capital of the Union.
Concept note-3: -Washington, D.C., formally the District of Columbia, also known as Washington, the District, or D.C., is the capital city and federal district of the United States.
Concept note-4: -Washington, DC, isn’t a state; it’s a district. DC stands for District of Columbia. Its creation comes directly from the US Constitution, which provides that the district, “not exceeding 10 Miles square, ” would “become the Seat of the Government of the United States."