[1] During the convalescence from his wound, Chapin was approached by Buffalo officials requesting he raise and lead a new regiment, the 116th New York Volunteer Infantry.

[4] Chapin and the 116th arrived at Ship Island, Mississippi, by sail on December 14, 1862, and by the end of the year they reached New Orleans, Louisiana.

On February 9, 1863, Chapin was given brigade command in the army of Maj. Gen. Nathaniel P. Banks, operating against Confederate forces defending the Mississippi River.

[5] What happened has been described as: After several hours of heavy Federal cannonading upon the Confederate works, at 3 pm on May 27, 1863, General Augur’s men advanced from the woods across an open area of about a mile in length obstructed by fascines, abattis, and underbrush.

Colonel Chapin’s Brigade rushed forward under heavy grape, shell, and canister fire from the Confederate artillery during which Colonel Chapin, wounded in the knee early in the contest, received a mortal wound from a Minié ball in the head within a few yards of the Rebel breastworks.

[4]After being wounded in the American Civil War with the second injury causing his death,[4] Chapin's body was sent back to Waterloo, New York, and was buried there in the city's Maple Grove Cemetery.