Executive Order—General Orders: 33
HEADQUARTERS OF THE ARMY,
By direction of the President of the United States, the following orders are made:
I. Brevet Major-General Irvin McDowell is relieved from the command of the Fourth Military District, and will report in person, without delay at the War Department.
II. Brevet Major-General Alvan C. Gillem is assigned to the command of the Fourth Military District, and will assume it without delay.
By command of General Grant:
Assistant Adjutant-General .
Andrew Johnson, Executive Order—General Orders: 33 Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/202982