HMS Allegiance was the American vessel King George, which the British captured in 1779 and brought into the Royal Navy as a sloop armed with fourteen 6-pounder guns.
There are at least two candidate vessels, with one in particular being the British privateer brigantine King George, of 14 guns, Captain Stanton Hazard, that the Connecticut sloop Revenge captured in August 1779.
On 24 February 1781, Allegiance entered Frenchman Bay, Maine, and put a landing party ashore at Point Harbour.
[3] In separate later engagements the French frigates captured three merchant vessels and recaptured the privateer Thorn.
Allegiance was anchored in Boston harbour on 6 August 1782 when Admiral the Marquis de Vaudreuil sailed in with ten ships-of-the-line.