42nd New York Infantry Regiment

42nd New York Infantry Regiment
Active	August 30, 1861 – October 11, 1864
Country	United States of America
Allegiance	Union
Branch	United States Army
Type	Infantry
Role	Infantry
Nickname(s)	Tammany Jackson Guard
Engagements	Lee's Mill Williamsburg Seven Days Battles Antietam Chancellorsville Deep Run Gettysburg Rappahannock Station Locust Grove Auburn Mine Run Wilderness Spotsylvania Courthouse Cold Harbor Petersburg Sailor's Creek Appomattox

The 42nd New York Infantry Regiment, also called the Tammany Regiment, was a regiment of the Union Army during the American Civil War which was formed up in mid-1861 and mustered in on June 22, 1861. It was organized by the Tammany Club, a New York Democratic Party club.