The 1st Battalion, 101st Cavalry was originally
organized on29 December 1860 in the New York State
Militia from new and existing companies at Albany as
the 10th Regiment (the New York State Militia was
redesignated on 23 April 1862 as the New York National
Guard). It was mustered into Federal service on 21
November 1862 at Albany as the 177th New York Volunteer
Infantry Regiment and mustered out of Federal service
on 10 September 1863 at Albany and resumed state status
as the 10th Regiment.