August 15, 1861
Issued by the U.S. War Department on August 15, 1861, General Orders Number 57 created the Department of the Cumberland.
GENERAL ORDERS, NO. 57
War Department, Adjutant-General’s Office,
Washington, August 15, 1861
The States of Kentucky and Tennessee will, in future, constitute a separate military command, to be known as the Department of the Cumberland, under the command of Brigadier-General Robert Anderson, U. S. Army.
L. THOMAS, Adjutant- General.