The 20th Connecticut Volunteer Infantry Regiment lost 4 officers and 76 enlisted men killed or mortally wounded and 3 officers and 85 enlisted men to disease during the Civil War.

It is honored by a monument at Gettysburg.

September 8 Organized at New Haven
September 11 Left State for Washington, D.C. and Duty in the Defenses of Washington; Attached to 2nd Brigade, 1st Division, 12th Army Corps, Army of the Potomac
September 29 Moved to Frederick, Md
October 2 To Sandy Hook
December 10 March to Fredericksburg, Va.
December 14 Duty at Fairfax Station, Va.
January 19-23 Moved to Stafford C. H.
April 27 Chancellorsville Campaign
May Transferred to 1st Brigade, 1st Division
May 1-5
Battle of Chancellorsville
June 11 Gettysburg Campaign
July 1-3
Battle of Gettysburg

The regiment was commanded at Gettysburg by Lieutenant Colonel William B. Wooster. It brought 434 men to the field and lost 5 killed, 22 wounded and 1 missing.From the regiment’s monument at Gettysburg:

The Brig. formed on this line on the morning of July 2nd. At eve it moved to the support left of army. Returning, it found the position and woods on rear occupied by Johnson’s Division, Ewell’s Corps. During the night it lay in line of battle. At dawn, July 3rd, the 20th Conn. advanced under cover of artillery and fought 5 hrs. driving the enemy and reoccupying the works. Was relieved by the 123rd N.Y. In the afternoon moved to support the 2nd Corps against Longstreet’s assault.

September 24 Near Raccoon Ford
September 24 Moved to Brandy Station, then to Bealeton and to Stevenson, Ala; Army of the Cumberland
October 3 Guard duty along Nashville & Chattanooga R. R.
January 20 Action at Tracy City, Tenn. (Co. “B”)
April 1st Brigade, 1st Division, 20th Army Corps, Army of the Cumberland, then 2nd Brigade, 3rd Division, 20th Army Corps
May Atlanta Ga. Campaign, 3rd Brigade, 3rd Division, 20th Army Corps
May 8-11 Demonstration on Rocky Faced Ridge
May 8-9 Buzzard’s Roost Gap
May 10 Boyd’s Trail
May 14-15 Battle of Resaca
May 19 Cassville
May 24-June 13 Guard Ordnance Trains
July 8 Provost duty at Ackworth, Ga.
July 16 At Marietta
July 19-20 Peach Tree Creek
July 22 –
August 25
Siege of Atlanta
August 26 – September 2 Operations at Chattahoochee River Bridge
September 2 – November 15 Occupation of Atlanta
November 15 – December 10 March to the sea
December 10 – 21 Siege of Savannah
January 4-16 At Hardee’s Plantation
January Campaign of the Carolinas
February 2 Lawtonville, S.C.
March 14 Reconnaissance to Silver Run Creek, N. C.
March 16 Averysboro or Taylor’s Hole Creek
March 19-21 Battle of Bentonville
March 24 Occupation of Goldsboro
April 14 Occupation of Raleigh
April 26 Bennett’s House; Surrender of Johnston and his army
April 29 –
May 20
March to Washington, D.C., via Richmond, Va.
May 24 Grand Review
June 13 Camp near Fort Lincoln
June 13 Mustered out