During the
American Civil War, Fort Preble became the headquarters and recruiting depot of the
17th US Infantry Regiment and was also mobilization site for volunteer regiments recruited in Maine. Soldiers from the fort saw action when
Confederate Army raiders entered Portland Harbor on June 26, 1863, aboard a captured ship named
Archer. The Confederates captured the United States Revenue Cutter
Caleb Cushing the next day, and attempted an escape in an action known as the
Battle of Portland Harbor. They were pursued by two steamers carrying soldiers and artillery pieces from Fort Preble, as well as about 100 civilian volunteers. Light wind made escape impossible and the Confederates abandoned the
Caleb Cushing in boats after setting the ship on fire. The fire detonated the ship's magazines and the
Cushing was destroyed by the explosion. Twenty-three Confederate prisoners were captured and taken to Fort Preble. They remained at Fort Preble until they were transferred to prisoner of war camps. During this action, Fort Preble was commanded by Major
George Lippitt Andrews. (Not to be confused with Brevet Major General
George Leonard Andrews.) Andrews was a native of Rhode Island who was appointed lieutenant colonel of the 1st Missouri Infantry at the start of the war. He was mustered out of volunteer service in September 1861 and was commissioned in the Regular Army as the major of the 17th Infantry. He was promoted to lieutenant colonel in 1864. In January 1871 he was promoted to colonel and assigned as commander of the
25th Infantry, one of the
Regular Army's four
African-American regiments at the time. He commanded the 25th Infantry for 21 years until he retired from the Army in 1892. On 15 July 1863, Billy Laird, a private in the 17th Maine Regiment, was
executed by firing squad at Fort Preble after being charged with
desertion. President
Abraham Lincoln pardoned Laird but the
telegraph message never got through due to the fact the telegraph wires in New York City which relayed the message from
Washington, D.C. to Maine were cut during the July 1863
draft riots. Laird was the only Maine soldier in the
Civil War to be executed for desertion. Construction on a major expansion of Fort Preble was undertaken during the Civil War. The old star fort remained to cover the land approach, and new granite
casemates typical of the Third System were to be built on the three water sides of the fort. Only a single tier of guns was projected. This project was abandoned incomplete, with some of the casemates remaining to the present. ==Post Civil War==