Daniel Chaplin (January 22, 1820 – August 20, 1864) was a Union army officer in the American Civil War. Under Chaplin’s command, the ill-fated charge of the 1st Maine Heavy Artillery Regiment against Confederate breastworks during Siege of Petersburg resulted on the greatest single loss of life by a Union Regiment in a single action. A total of 7 officers and 108 men were killed, and another 25 officers and 464 men wounded. These casualties constituted 67% of the strength of the 900-man force. Chaplin survived the action but was subsequently shot by a sharpshooter at Battle of Deep Bottom in 1864, and died four days later in a Philadelphia hospital. Daniel Chaplin was born in Red Bank, New Brunswick, Canada, on 22 Jan 1820. He moved with his family to Bridgton, Maine when he was about three years of age. There he lived until he was about twenty-one, when he became a clerk for Thurston and Metcalf, ship chandlers, of Bangor, Maine. When the Civil War broke out, he enlisted as a Private in Company F of the Second Maine Infantry Regiment, which was raised in Bangor. He was chosen Captain of the company 28 May 1861, and was promoted to the rank of Major, 13 September of that year. On 11 July 1862, he was appointed Colonel of the Eighteenth Maine Regiment, which became in January 1863, the First Maine Heavy Artillery.

Daniel Chaplin is buried in Mount Hope Cemetery, Bangor. In 1867 he was appointed a Brigadier General by Brevet in the Volunteer Army of the United States, for gallant and meritorious services at the Battle of Deep Bottom, Virginia, to date from 17 August 1864. The same General Order appointed him Major General by Brevet, as of the same date. In the HISTORY OF THE FIRST MAINE HEAVY ARTILLERY appears this tribute to him: “He was born a soldier, attractive and magnetic in person, a fine horseman with commanding presence. He gave to his officers a royal friendship, to his soldiers a fatherly care, and to all a considerate appreciation of merit, wherever found. He was brave almost to recklessness, but modest withal”.