The 22nd Regiment United States Colored Troops lost 2 officers and 70 enlisted men killed or mortally wounded and 1 officer and 144 enlisted men to disease during the Civil War.

1864
January 10-29 Organized at Philadelphia, Pa.
January 30 Ordered to Yorktown, Va.
February Duty near Yorktown, Va. Attached to U.S. Forces, Yorktown, Va., Dept. of Virginia and North Carolina.
March 9-12 Expedition to King and Queen County
April Attached to 1st Brigade, Hincks’ Division (Colored), 18th Corps, Army of the James
May 4-June 15 Butler’s operations south of James River and against Petersburg and Richmond. Duty at Wilson’s Wharf, James River, protecting supply transports, then constructing works near Fort Powhatan
May 21 Attack on Fort Powhatan
June Attached to 1st Brigade, 3rd Division, 18th Corps
June 15-18
Assaults on Petersburg

From the wayside marker at Battery 8 on the Petersburg defences:

On June 15, 1864, after seizing Battery 5, Union troops swept southward along the Dimmock Line. Men of the 1st and 22nd Colored Troops captured Battery 8, overcoming heavy resistance from part of Brig. Gen. Henry A. Wise’s Virginia brigade. By the morning of June 16, the 1.5 miles of Confederate works between Batteries 3 and 11 were in Union hands.

June 16 – April 2
Siege of Petersburg and Richmond

There is a monument to the men of the United States Colored Troops on the Petersburg battlefield

July Attached to 2nd Brigade, 3rd Division, 18th Corps.
August Attached to 1st Brigade, 3rd Division, 18th Corps, then 1st Brigade, 3rd Division, 10th Corps
August 24 Deep Bottom, and Dutch Gap
September 28-30 Demonstration north of the James River. Attached to 1st Brigade, 3rd Division, 18th Corps.
September 29-30 Battle of Chaffin’s Farm, New Market Heights
September 29 Fort Harrison
October 27-28 Battle of Fair Oaks
November 4 Chaffin’s Farm
December In trenches before Richmond attached to 1st Brigade, 3rd Division, 25th Corps, then 1st Brigade, 1st Division, 25th Corps

1865

April 3 Occupation of Richmond
April Moved to Washington, D.C., and participated in the obsequies of President Lincoln, and afterwards to eastern shore of Maryland and along lower Potomac in pursuit of the assassins.
May Rejoined Corps
May 24-June 6 Moved to Texas
June-October Duty along the Rio Grande
October 16 Mustered out