During the American Civil War, he was an assistant paymaster serving the Atlantic Fleet. Hackett was on board USS Miami during its skirmish against CSS Albemarle.[2] After the war, he passed the bar exam and eventually opened a law office in Washington, D.C. From April 1900 to December 1901, Hackett served as Assistant Secretary of the Navy.
^ ab"Frank Hackett Passes Away in Portsmouth". Biddeford Daily Journal. Portsmouth, New Hampshire. AP. August 10, 1926. p. 1. Retrieved April 23, 2023 – via Newspapers.com.