GENERAL ORDERS, 
No. 12. 
WAR DEPARTMENT, 
Adjutant Genekal’s Office, 
Washington, April 27, 1861. 
1. The Military Department of Washington will include the Dis- 
trict of Columbia, according to its original boundary, Fort Washing- 
ton and the county adjacent, and the State of Maryland as far as 
Bladensburg, inclusive. Colonel J. K. F. Mansfield, Inspector Gene- 
ral, is assigned to the command, Headquarters Washington City. 
2. A new Military Department, to be called the Department of 
Annapolis, Headquarters at that city, will include the country for 
twenty miles on each side of the railroad from Annapolis to the city 
of Washington, as far as Bladensburg, Md. Brigadier General B. F. 
Butler, Massachusetts Volunteers is assigned to the command. 
3. A Third Department, called the Department of Pennsylvania, 
will include that State, the State of Delaware .and all of Maryland not 
embraced in the foregoing Departments. Major General Patterson to 
command, Headquarters at Philadelphia, or any other point he may 
temporarily occupy. 
4. Brevet Colonel C. F. Smith, having been relieved by Colonel 
Mansfield, will repair to Fort Columbus, N. Y., and assume the duties 
of Superintendent of the Recruiting Service to which he was assigned 
in Special Orders No. 80, of March 15. Major Heintzelman, on being 
relieved at Fort Columbus, will repair to this city and report for duty 
to the Department Commander. 
5. Fort Adams, Rhode Island, is hereby placed temporarily under 
the control of the Secretary of the Navy, for the purposes of the 
Naval Academy now at Annapolis, Md. 
The necessary transfer of property will be made by the Departments 
interested. 
B? ORDER 
L. THOMAS, 
Adjuiant General. 
Official: 
Assistant Adjutant General.