Massachusetts Regiments, Batteries and Independent Companies in the Eastern Theater of the American Civil War

Massachusetts Regiments, Batteries and Independent Companies 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 at the bottom.
Infantry 1st -25th	Infantry 26th - 61st	Cavalry
1st Battalion Infantry 1st Regiment Infantry 2nd Regiment Infantry 3rd Regiment Infantry 3rd Battalion Rifles 4th Regiment Infantry 5th Regiment Infantry 6th Regiment Infantry 7th Regiment Infantry 8th Regiment Infantry 9th Regiment Infantry 10th Regiment Infantry 11th Regiment Infantry 12th Regiment Infantry 13th Regiment Infantry 14th Regiment Infantry 15th Regiment Infantry 16th Regiment Infantry 17th Regiment Infantry 18th Regiment Infantry 19th Regiment Infantry 20th Regiment Infantry 21st Regiment Infantry 22nd Regiment Infantry 23rd Regiment Infantry 24th Regiment Infantry 25th Regiment Infantry	26th Regiment Infantry 28th Regiment Infantry 29th Regiment Infantry 30th Regiment Infantry 32nd Regiment Infantry 33rd Regiment Infantry 34th Regiment Infantry 35th Regiment Infantry 36th Regiment Infantry 37th Regiment Infantry 38th Regiment Infantry 39th Regiment Infantry 40th Regiment Infantry 46th Regiment Infantry 51st Regiment Infantry 56th Regiment Infantry 57th Regiment Infantry 58th Regiment Infantry 59th Regiment Infantry 60th Regiment Infantry 61st Regiment Infantry 1st Company Sharpshooters 2nd Company Sharpshooters	1st Regiment Cavalry 2nd Regiment Cavalry 3rd Regiment Cavalry 4th Regiment Cavalry 5th Regiment Cavalry (Colored) Devin's Battalion Mounted Rifles
		Artillery
		1st Regiment Heavy Artillery 3rd Regiment Heavy Artillery 4th Regiment Heavy Artillery Unattached Heavy Artillery Companies 1st Battery Light Artillery 2nd Battery Light Artillery 3rd Battery Light Artillery 5th Battery Light Artillery 7th Battery Light Artillery 8th Battery Light Artillery 9th Battery Light Artillery 10th Battery Light Artillery 11th Battery Light Artillery 14th Battery Light Artillery 16th Battery Light Artillery Cook's Battery Artillery
These units served their entire histories outside the eastern theater were: the Independent Cavalry Battalion and 2nd Cavalry Battalion; the 1st Battalion Heavy Artillery, 2nd Regiment Heavy Artillery and several independent companies of heavy artillery; the 4th, 6th, 12th, 13th and 15th Batteries Light Artillery; and the 27th, 31st, 41st, 42nd, 43rd, 44th, 45th, 47th, 48th , 49th, 50th, 52nd, 53rd, 54th, and 55th infantry regiments The 62nd Infantry never completed its organizaton, which was underway at war's end.