Massachusetts provided to the Union Army 5 regiments and 3 battalions of cavalry; 4 regiments, 1 battalion and 30 independent companies of heavy artillery; 18 batteries of light artillery; 2 companies of sharpshooters; and 71 regiments and 3 battalions of infantry. Most served in the eastern theater, with exceptions listed below.
The 27th, 31st, 41st, 42nd, 43rd, 44th, 45th, 47th, 48th , 49th, 50th, 52nd, 53rd, 54th, and 55th infantry regiments did not serve in the Eastern Theater. The 62nd Infantry never completed its organizaton, which was underway at war’s end.
|1st Infantry Battalion • 1st Massachusetts • 2nd Massachusetts • 3rd Massachusetts
The Independent Cavalry Battalion and the 2nd Cavalry Battalion did not serve in the Eastern Theater.
The 1st Battalion Heavy Artillery, 2nd Regiment Heavy Artillery and several independent companies of heavy artillery did not serve in the Eastern Theater.
The 4th, 6th, 12th, 13th and 15th Light Artillery Batteries did not serve in the Eastern Theater.