He was appointed Second Lieutenant and First Lieutenant, 1st United States Artillery, August 1, 1861, and then promoted through the grades to Brigadier General, July 24, 1903. He was breveted Captain, July 8, 1863 "for gallant and meritorious services in the capture of Port Hudson, Louisiana," Major, March 13, 1865, "for good conduct and gallant services during the war."

After the Civil War served in New York. South Carolina, Maine, California, Oregon and Connecticut. He was sent in command of a regiment to Cuba, December 1898, and 1902 designated to command US troops still remaining there.

He retired at own request after 40 years of service, July 29, 1903. He made his home at  New London, Connecticut and died there on September 24, 1931.  He was buried with full military honors in Section 1 of Arlington National Cemetery.

His wife, Annie L. Davis Haskin (1844-1921) is buried with him.

HASKIN, WILLIAM L
BRIG GEN US ARMY RET
VETERAN SERVICE DATES: Unknown
DATE OF DEATH: 09/24/1931
DATE OF INTERMENT: 09/26/1931
BURIED AT: SECTION W  SITE 151 A/B
ARLINGTON NATIONAL CEMETERY