On July 13, 1864, the U.S. War Department issued General Orders, No. 229, assigning Major General H. G. Wright to the chief command of all the forces moving against the enemy retreating from Washington.
General Orders, No. 229
War Department, Adjutant General’s Office
Washington, July 13, 1864
I.. By command of the President, Major General H. G. Wright is assigned to the chief command of all the forces moving against the enemy now retreating from Washington. This assignment embraces the 19th Corps, under command of Brigadier General Emory, and any forces that may join General Wright from the commands of Major General Hunter, Major General Ord, or elsewhere.
II.. Major General Gillmore is relieved from the temporary command of the part of the 19th Corps in the Department of Washington, and will report to the Adjutant General. Brigadier General W. H. Emory will remain in temporary command of the portion of the 19th Corps brought by him from the Department of the Gulf.
BY ORDER OF THE SECRETARY OF WAR:
Assistant Adjutant General.