The Civil War in the East

United States Armies & Departments

Department of Annapolis (April - July 1861)
(Department of Maryland) (July 1861)

 

The department was created on April 27, 1861 to control the vital corridor from the northern states into Washington. General Orders #12 removed from the Department of Pennsylvania part of Maryland "to include the counties for twenty miles on each side of the railroad from Annapolis to Washington, as far as Bladensburg," to become the Department of Annapolis.

 

The department was briefly renamed "Department of Maryland" before being merged into the Military District of the Potomac at the end of July.

Order of Battle for the Department of Annapolis and Department of Maryland

 

Department of Annapolis Order of Battle, April 1861

Department of Annapolis Order of Battle, May 1861

Department of Annapolis Order of Battle, June 1861

Department of Annapolis/Department of Maryland Order of Battle, July 1861

 

Timeline of the Department of Annapolis

April 19, 1861

Federal troops are fired upon in the streets of Baltimore

The Sixth Massachusetts Infantry lose 3 dead and 40 wounded when attacked by a mob while transferring between train stations in Baltmore. Additional troops are turned back as they arrive, the railroad bridges into town from the north are burnt, and the only railroad to Washington D.C. from the north is cut.

April 21

Massachusetts Militia Brigadier General Benjamin F. Butler siezes the ferry Maryland at Havre de Grace and sails the Eighth Massachusetts Infantry to Annapolis.

April 22

Butler secures Annapolis, providing an alternative route to Washington

April 27

The Department of Annapolis is created under Brigadier General Butler.

May 13

Butler secures Baltimore with a quick and bloodless occupation. General Scott is outraged that his slower and more elaborate plans were upstaged by a militia general, and orders Butler to be relieved and transferred to command of Fort Monroe.

May 15

Major General George Cadwalader takes command of the department

June 11

Major General Nathaniel P. Banks takes command of the department

July 19

The department's name is changed to the "Department of Maryland." Major General John A. Dix takes command.

July 25 , 1861

The Department of Maryland is merged into the Military District of the Potomac. Departmental troops are organized as Dix's Division.