On January 12, 1864, the U.S. War Department issued General Orders, No. 17, placing Major General Samuel P. Heintzelman in charge of the newly created Northern Department.
General Orders, No. 17
War Department, Adjutant General’s Office
Washington, January 12, 1864
By direction of the President of the United States, Major General S. P. Heintzelman U. S. Volunteers, is placed in command of the Northern Department which will be composed of the States of Michigan, Ohio, Indiana, and Illinois — Headquarters at Columbus, Ohio.
By order of the Secretary of War:
E. D. TOWNSEND,
Assistant Adjutant General.
Assistant Adjutant General