numbered, at Chickamauga, 14,040 present for duty. Wagner's (2d) Brigade, of Wood's (1st) Division, was not engaged, having been left on duty at Chattanooga. Two regiments were also detailed elsewhere, leaving 11,480 men in action. Of this number, the corps lost 322 killed, 2,382 wounded, and 699 missing; total, 3,403. There seems to be a general impression that, after the disaster at Chickamauga, the day was saved solely by Thomas' Corps. In justice to the gallant men of Crittenden's command, it should be stated that Palmer's Division of the Twenty-first Corps fought with Thomas during the whole battle; and that General Wood with two brigades of his own division, and one from Van Cleve's which was not cut off, went to the aid of Thomas on the second day. Soon after this battle the Twentieth and the Twenty-first Corps were consolidated, forming the Fourth Corps. General Crittenden was left without a command, but was subsequently assigned to a division in the Ninth Corps, Army of the Potomac, while on the Wilderness campaign of the following spring.
This organization comprised the troops occupying the defenses of Washington. It was organized February 2, 1863, with Major-General S. P. Heintzelman in command. He was succeeded by Major-General C. C. Augur, who was in command at the time of Early's invasion in July, 1864. At that time the Confederate troops advanced within the limits of the city of Washington, and a severe battle was fought at Fort Stevens, in the outskirts of the city. In this battle the principal part of the fighting devolved upon the Sixth Corps; but prior to its arrival, Hardin's Division of the Twenty-second Corps held the skirmish line and the outer line of works, confronting Early's advance, Hardin's troops were under fire and became engaged at various points on the line, their losses amounting to 73, killed and wounded. The roster of the corps was continually changing, as the Department was being continually drawn upon for reinforcements for the field, thereby preventing anything like a continuous organization. At one time, the corps was commanded by Major-General Jno. G. Parke, while among its various division commanders were Generals Hardin, De Russy and Hascall.
- Lenoir -- Blue Springs -- Campbell's Station -- Knoxville -- Mossy Creek -- Dandridge -- Walker's Ford -- Strawberry Plains -- Rocky Face Ridge -- Resaca -- Cassville -- Dallas -- Pine Mountain -- lost Mountain -- Culp's Farm -- Kenesaw -- Chattahoochie -- Decatur -- Siege of Atlanta -- Utoy Creek -- Lovejoy's Station -- Columbia -- Spring Hill -- Franklin -- Nashville -- Fort Anderson, N. C. -- Town Creek -- Wilmington -- Kinston -- Goldsboro.
General Burnside was assigned to the command of the Department of the Ohio in the spring of 1863, his district including Kentucky and East Tennessee. The Ninth Corps left Virginia at this time and was assigned to his command; but, having planned an active campaign in East Tennessee, and needing additional troops, he organized the Twenty-third Corps from the regiments then stationed in Kentucky. This new corps was formed April 27, 1863, with Major-General George L. Hartsuff in command. Generals Julius White and Milo S. Hascall were assigned to division commands.