The First Maine Heavy Artillery Regiment was mustered August 21, 1862 as part of the 18th Maine Regiment and reorganized December, 1862 as First Maine Heavy Artillery. They mustered out September 11, 1865. This regiment of 900 men sustained the greatest loss in battle, suffering 632 casualties in about 15 minutes during the Siege of Petersburg, more than any Union regiment losses in a single day of combat throughout the war.
They served in the following engagements:
- Defense of Washington - Sept. 1862 to May 1864
- Fredericksburg Pike, VA - May 19, 1864
- Milford Station - May 20, 1864
- North Anna, VA - May 23, 1864
- Totopotomy, VA - May 26, 1864
- Cold Harbor, VA - May 31, 1864
- Petersburg, VA - June 18, 1864
- Jerusalem Plank Road, VA - June 22 - 23, 1864
- Deep Bottom, VA - August 18, 1864
- Boydton Plank Road, VA - October 27, 1864
- Weldon Railroad, VA - December 7, 1864
- Hatchers Run, VA - February 5, 1865
- Sailors Creek, VA - April 6, 1865
- Farmville, VA - April 7, 1865
- Appomattox, VA - April 8, 1865
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1864-03-23 Captain William R. Pattangall recommends promotion of Edward B. Kilby
William R. Pattangall
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1864-04-08 Affidavit of Ephraim K. Smart regarding authorization to recruit men for Maine regiments
Ephraim K. Smart and L. L. Wadsworth
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1864-04-08 E.K. Smart, J.W. McMahon, and John J. Sherman, Selectmen of Pembroke, write Adjutant General Hodsdon regarding recruits Bela Antonez, Leonard Beranth, and Benjamin Apt
Ephraim K. Smart, J. W. McMahon, and John J. Sherman
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1864-04-08 Ephraim K. Smart, J.W. McMahon, and John J. Sherman, Selectmen of Pembroke, write Adjutant General Hodsdon regarding recruits
Ephraim K. Smart, J. W. McMahon, and John J. Sherman