John Haskell Calef

John Haskell Calef (September 24, 1841 – January 4, 1912) was a career artillery officer in the United States Army, and a veteran of the American Civil War.

Born in Gloucester, Massachusetts to John Church Calef and his wife Eliza Baldwin Haskell, he had at least three older sisters and a brother.

While in command of Battery A during the early summer of 1863, his three-inch rifles supported Buford on the first day of the Battle of Gettysburg.

For his bravery during that battle and exemplary service during the war, Lieutenant Calef received brevet promotions to captain and major.

Though Calef's reasons for turning down the promotion can only be speculated, many officers at the time considered to accept command of black troops a career ending move.