| United States|
| September 6, 1862 to July 6, 1865|
and VI Corps
The 9th New York Heavy Artillery Regiment was a regiment in the American Civil War.
9th New York Heavy Artillery Regiment Wikipedia
The regiment was originally mustered in on September 8, 1862 as the 138th New York Infantry Regiment, was quickly taken to Washington D.C. to be used in the defenses of the nation's capitol. On December 19, 1862, it was redesignated as the 9th New York Heavy Artillery Regiment. On February 5, 1863, an additional Company M was created within the regiment with the transfer of the 22d N.Y. Volunteer Battery. Company L was organized in Albany between November 4 and December 9, 1863.
Amongst the regimental commanders, William H. Seward, Jr. stands out as he is the son of then Secretary of State William H. Seward.
The Regiment was divided into three battalions. After the formation of the regiment, its duties were the protection of the capitol. After General Ulysses S. Grant took command of the Union Army, most of the troops defending the capitol, including the 9th New York Heavy Artillery, were called to bolster troop numbers. Beginning with in Cold Harbor, two of the battalions joined with the VI Corps and the Army of the Potomac, while one remained behind to guard the capitol.
Defense of Washington D.C. (September 1862-May 1864)
September 1862-August 1863: The Regiment stationed near Washington DC (Fort Bunker Hill, Fort Kearney, Fort Mansfield, and Fort Reno).
August 1863-May 1864: Construction of Fort Foote.
May 18, 1864: Joined the Army of the Potomac
Overland Campaign (May through June 1864)
May 26: Battle of North Anna
May 26–28: On line of the Pamunky River
May 28–31: Battle of Totopotomoy Creek
June 1–12: Battle of Cold Harbor
June 1–3: Bethesda Church
June 18-July 6: Beginning of the Siege of Petersburg
June 22–23: Battle of Jerusalem Plank Road, Weldon Railroad Jerusalem Plank Road
July 6–8: Move to Baltimore
July 9: Battle of Monocacy
Shenandoah Valley Campaign of 1864 (August 7 – November 28)
August 21–22: Battle of Summit Point
August 29: Battle of Summit Point
September 19: Battle of Winchester
September 22: Battle of Fisher's Hill
October 19: Battle of Cedar Creek
October through December: Duty at Kernstown
December 3: Moved to Washington, D.C., then to Petersburg
Siege of Petersburg (December 1864-April 1865)
March 25, 1865: Fort Fisher
Appomattox Campaign (March 28-April 9)
April 2: Assault and fall of Petersburg
April 5: Battle of Amelia Springs
April 6: Battle of Sayler's Creek (also known as Sailor's Creek, Hillsman Farm, or Lockett Farm)
April 9: Battle of Appomattox Court House: surrender of Lee and his Army
April 17–27: Expedition to Danville
April through June: Duty at Danville and Richmond
June 8: Corps Review in Washington D.C.
Regiment losses included 10 Officers and 204 Enlisted men killed or mortally wounded. 247 Enlisted men died by disease. The total deaths were 461 Total, not including wounded casualties.
After the war, the soldiers of the Regiment not eligible for discharge from service were transferred to the 2nd New York Volunteer Artillery Regiment. They formed four companies, I, K, L and M.