The monument to the 3rd New York Independent Battery is south of Gettysburg on Taneytown Road just south of the National Cemetery. (39.816728° N, 77.232224° W; Google map; Tour map: Taneytown Road)

Monument to the 3rd New York Independent Battery at GettysburgThe battery was commanded at the Battle of Gettysburg by Captain William A. Harn. It brought 119 men to the field serving six 10-pounder Parrott Rifles.

6th Corps Headquarters Flag

From the front of the monument:

3rd N.Y. Independent Battery
Artillery Brigade Sixth Corps
July 2 & 3, 1863

Rear view of the monument to the 3rd New York Independent battery at Gettysburg

Rear view of the monument

From the rear of the monument:

Forced marched 36 miles, second position.
—-
No losses. Mustered in May 21, 1861, participating
in all the campaigns of the Army of
the Potomac to the end of the war.

Monument to the 3rd New York Independent battery at Gettysburg

Looking east from Taneytown Road. The National Cemetery is on the left.

See more on the 3rd New York Independent Battery in the Civil War