26th New York Infantry Regiment "2nd Oneida Regiment"

The 26th lost 5 officers and 101 enlisted men killed and mortally wounded and 42 enlisted men to disease, a total of 148.

Timeline of the 26th New York Infantry Regiment

May 21, 1861	Organized at Elmira, N.Y., and mustered in under Colonel William H. Christian, Lieutenant Colonel Richard H. Richardsonand Major Gilbert S. Jennings
June 19	Left State for Washington, D.C.
June 20	Arrived in Washington. Attached to McCunn's Brigade, Army of Northeast Virginia and duty in the Defenses of Washington, D. C., and at Fort Lyon
June 21	Marched 11 miles toward Bull Run, meeting the returning army, and returned to Alexandria
August	Attached to Heintzelman's Brigade, Division of the Potomac
October	Attached to Slocum's Brigade, Franklin's Division, Army of the Potomac
March	Attached to Wadsworth's Command, Defenses of Washington
May, 1862	Attached to 1st Brigade, Ord's Division, Dept. of the Rappahannock
October 3	Expedition to Pohick Church, Va.
October	Duty near Fredericksburg, Va.
May 25-June 18	Expedition to Front Royal
June	Attached to 2nd Brigade, 2nd Division, 3rd Corps, Pope's Army of Virginia
July	Duty at Manassas, Warrenton and Culpeper
August 9	Battle of Cedar Mountain
August 16	Pope's Campaign in Northern Virginia
August 21-23	Fords of the Rappahannock
August 28	Thoroughfare Gap
August 29	Battle of Groveton
August 30	Battle of 2nd Bull Run The regiment lost 4 officers and 50 enlisted men killed or mortally wounded (including Captains Casselman and G. S. Jennings and Lieutenant Leonard), 2 officers and 87 enlisted men wounded and 25 enlisted men missing or captured. Colonel Christian took command of the brigade, leaving Lt. Colonel Richardson in command of the regiment
September 1	Battle of Chantilly
September 6-22	Maryland Campaign; attached to 2nd Brigade, 2nd Division, 1st Army Corps, Army of the Potomac
September 14	Battle of South Mountain The regiment suffered two wounded
September 16-17	Battle of Antietam The regiment was commanded by Lt. Colonel Richardson while Colonel Christian commanded the brigade. It lost 7 enlisted men killed or mortally wounded, 39 enlisted men wounded and 20 enlisted men missing or captured.
Saptember 18	At Sharpsburg, Md.
September 19 - 20	Colonel Christian resigned. Lieutenant Colonel Richardson promoted to colonel, Major Jennings to lieutenant colonel and Captain Ezra F. Wetmore of Company F to major.
October 30- November 19	Movement to Falmouth, Va.
November 20	At Brook's Station
December 12-15	Battle of Fredericksburg The regiment lost Adjutant WIlliam K. Baker and 43 enlisted men killed or mortally wounded, Lieutenant Colonel Jennings, 9 other officers and 103 enlisted men wounded, and 11 enlisted men missing or captured.
January 20-24, 1863	"Mud March"
February	At Falmouth and Belle Plains
April 27	Chancellorsville Campaign
May 6	Operations at Pollock's Mill Creek
May 1-5	Battle of Chancellorsville
May 28, 1863	Three hundred fifty men mustered out under Colonel Richardson, Lieutenant Colonel Jennings and Major Wetmore. Three years men transferred to 97th Regiment New York Infantry.