The Oneida Cavalry Company lost 10 men to disease during the Civil War. It is honored by a monument at Gettysburg.

The Oneida Cavalry is unique in that it is the only unit to serve at the headquarters of every general of the Army of the Potomac throughout the war, and is the only independent company-sized unit to serve through the war.

1861
Organized in Oneida, N. Y.
September 4 Mustered in under the command of Captain Daniel P. Mann, First Lieutenant James E. Jenkins and Second Lieutenant Frank Vane
September 6 Moved to Washington, D.C. and attached to Stoneman’s Cavalry Command, Army of the Potomac
1862
April At Headquarters, Army of the Potomac, as escort, performing escort and guard duty and providing couriers
September 17
Battle of Antietam
1863
May 1-3
Battle of Chancellorsville
July 1-3
Battle of Gettysburg

The company was commanded at Gettysburg by Captain Daniel P. Mann. It brought 49 men to the field and suffered no casualties.

1864
May 17 Privates Anson Harrington and Peter Nevin captured carrying despatches at Belle Plain, Virginia. Private Nevin escaped in June and returned to the company. Private Harrington was paroled in December.
September Three years service men mustered out
December 10 Captain Mann mustered out. Lieutenant Jenkins took command of the company
1865
January 18 Lieutenant Jenkins was promoted to captain
June 13 Mustered out and honorably discharged from service under Captain Jenkins