HMS Allegiance was originally an American vessel named King George, captured by the British in 1779 during the American War of Independence. She was likely a British vessel that had been captured by Americans beforehand, but details remain uncertain. The ship was a sloop armed with fourteen 6-pounder guns, a typical armament for vessels of her class during that period. Commissioned into the Royal Navy under Commander David Phips (or Phipps), an American Loyalist, Allegiance served primarily in North American waters. Her notable service includes a landing operation on 24 February 1781 in Frenchman Bay, Maine, where her landing party captured two prominent Americans, Captain David Sullivan and James Sullivan. The most significant engagement in her career occurred on 21 July 1781 off Spanish River, Cape Breton, Nova Scotia. During this action, Allegiance was part of a convoy escort that was attacked by two French frigates, Astrée and Hermione. The escort comprised the frigate Charlestown, Allegiance, the sloop Vulture, the armed transport Vernon, and a smaller armed vessel named Jack. The French frigates succeeded in capturing the smaller vessel Jack and inflicted casualties on the British escort, but Allegiance was not heavily engaged and the merchant vessels managed to reach safety. In August 1782, Allegiance was anchored in Boston harbor when French forces under Admiral de Vaudreuil arrived with a fleet. Unable to escape, Allegiance surrendered to the French 74-gun ship Northumberland. The French Navy purchased her in late 1782. Later, on 23 January 1783, the British recaptured Allegiance from the French, who had been using her as a transport carrying 200 troops. Despite her return to British hands, she was not recommissioned into service and appears to have been laid aside afterward. Throughout her career, Allegiance participated in notable naval actions during the American Revolutionary War, reflecting the complex maritime conflicts of that period.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.