(1819–98) Union naval officer, author, and inventor, born in Brown County, Ohio. In the Civil War, he commanded blockade ships around southern ports and led assaults in several important engagements, including the attack on Forts Walker and Beauregard at Port Royal (1861). He was promoted to commander in 1863 and was given command of the monitor vessel Patapsco. With this vessel he participated in the attack on Fort Sumter (1863). Commanding naval recruits aboard the passenger steamer Ocean Queen bound for Panama, he suppressed a mutinous uprising (1864). After the war, Ammen was the director of the Bureau of Navigation (1871–78) and the secretary of the Isthmian Canal Commission (1872–76).
From The Oxford Essential Dictionary of the U.S. Military in Oxford Reference.
Subjects: Warfare and Defence.