12/13/1863
https://www.presidency.ucsb.edu...
"Third Corps to consist of three divisions, and to be commanded by Brigadier-General S. P. Heintzelman."
"Fourth Corps to consist of three divisions, and to be commanded by Brigadier-General E. D. Keyes."
"No more than two army corps (about 50,000 troops) of said Army of the Potomac shall be moved en route for a new base of operations until the navigation of the Potomac from Washington to the Chesapeake..."
"That .this order be executed with such promptness and dispatch as not to delay the commencement of the operations already directed to be undertaken by the Army of the Potomac."