William F. Fox, Lt. Col. U. S. V., Regimental Losses in the American Civil War, 1861-1865: A Treatise on the extent and nature of the mortuary losses in the Union regiments, with full and exhaustive statistics compiled from the official records on file in the state military bureaus and at Washington

Thirty-Seventh Wisconsin Infantry.

156 killed == 14 per cent.

Total of killed and wounded, 557; died in Confederate prisons (previously included), 21.

Present, also, at Pegram Farm; Hatcher's Run; Fort Stedman.

notes.--The Thirty-seventh was recruited in response to the call of February 1, 1864, for 500,000 more men, and was organized at Madison under the superintendence of Colonel Harriman, who had served previously as a captain in the Thirtieth Wisconsin. Six companies left Wisconsin on the 28th of April, 1864, two more companies joining them at Washington about two weeks later. The eight companies left Washington on the 30th of May, proceeding by steamer to White House Landing, Va., where, on June 10th, they joined the army, then at Cold Harbor, near by. The regiment was assigned to the First Brigade (Hartranft's), Third Division (Willcox's), Ninth Corps. The Thirty-seventh was in action for the first time in the assaults on Petersburg, June 17th and 18th; the regiment made a gallant charge on the enemy's works, but was obliged to retire with a heavy loss; its casualties amounted to 33 killed, 122 wounded, and 2 missing. While in the trenches before Petersburg, Company G joined the command. At the Mine Explosion, the regiment occupied a position in the Crater, which it was forced to abandon after having sustained a severe loss in its efforts to hold it; out of 250 who advanced to the assault, it lost 34 killed, 59 wounded, and 52 missing. It was transferred soon after to the First Brigade of the First Division, General Willcox commanding the division. It participated in all the succeeding battles of the Ninth Corps, and in the dangerous duty in the trenches during the long siege. Under command of Colonel Green it took a prominent and honorable part in the successful assault of April 2, 1865, which resulted in the capture of Petersburg. In that assault, three companies of the Thirty-seventh were the first troops to effect an entrance in Fort Mahone, a stronghold located in front of the Ninth Corps. After Lee's surrender the regiment returned to Washington, where it marched in the Grand Review, and then encamped until July 26, 1865, when it was mustered out.