The Massachusetts 1st Infantry Regiment was organized at Boston and mustered in Companies "A," "B," "G" and "H" May 23; Companies "D," "F," "K" and "I" May 24; Company "E" May 25, and Company "C" May 27, 1861. The Regiment lost during service 8 Officers and 134 Enlisted men killed and mortally wounded and 1 Officer and 78 Enlisted men by disease. Total 221.
Left State for Washington, D. C., June 15, arriving June 17. Attached to Richardson's Brigade, Tyler's Division, McDowell's Army of Northeast Virginia, to August, 1861. Hooker's Brigade, Division of the Potomac, to October, 1861. 1st Brigade, Hooker's Division, Army of the Potomac, to March, 1862. 1st Brigade, 2nd Division, 3rd Army Corps, Army of the Potomac, to March, 1864. 1st Brigade, 4th Division, 2nd Army Corps, to May, 1864.
Duty at Camp Banks, Georgeton, D. C., till July 16, 1861. Advance on Manassas, Va., July 16-21. Occupation of Fairfax Court House July 17. Battle of Bull Run July 21. At Fort Albany till August 15. Moved to Bladensburg August 15 and duty there till September 7. Expedition to Lower Maryland September 7-October 7. Moved to Posey's Plantation October 25-27. Duty there and at Shipping Point till April 5, 1862. Affair at Mattawoman Creek November 14, 1861. Ordered to Fortress Monroe, Va., April 7, 1862; thence to Yorktown. Siege of Yorktown April 16-May 4. Affair at Yorktown April 26 (Cos. "A," "H" and "I"). Battle of Williamsburg May 5. Battle of Fair Oaks, Seven Pines, May 31-June 1. Seven days before Richmond June 25-July 1. Battles of Oak Grove June 25; Savage Station June 29; White Oak Swamp and Glendale June 30; Malvern Hill July 1. At Harrison's Landing till August 15. Movement to Fortress Monroe, thence to Centreville August 15-26. Bristoe Station or Kettle Run August 27. Auburn August 28. Battles of Groveton August 29, and Bull Run August 30. Duty in the Defences of Washington till December -. At Fort Lyon till September 13. Near Fairfax Seminary till October 20, and at Munson's Hill till November 1. Duty at Fairfax Station November 2-25. Operations on Orange & Alexandria Railroad November 10-12. Battle of Fredericksburg, Va., December 12-15. "Mud March" January 20-24, 1863. At Falmouth till April 27. Operations at Rappahannock Bridge and Grove Church February 5-7. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5. Gettysburg (Pa.) Campaign June 11-July 24. Battle of Gettysburg July 1-3. Pursuit of Lee till July 24. Moved to New York July 30-August 1. Duty at Governor's Island, Ricker's Island and David's Island, New York Harbor, till October 15. Moved to Washington October 15, thence to Union Mills, Va., and rejoin Corps October 17. Advance to line of the Rappahannock November 7-8. Kelly's Ford November 7. Mine Run Campaign November 26-December 2. Mine Run November 27. Duty near Brandy Station till May, 1864. Demonstration on the Rapidan February 6-7. Rapidan Campaign May 3-20. Battles of the Wilderness May 5-7; Spottsylvania May 8-12; Spottsylvania Court House May 12-21. Assault on the Salient at Spottsylvania Court House May 12. Harris Farm or Fredericksburg Road May 19. Ordered home for muster out May 20. Veterans and Recruits transferred to 11th Massachusetts Infantry May 20. Mustered out May 25, 1864. Expiration of term.