After the declaration of war in June 1812, work began on the northeast bastion. During the war, the fort was manned by British Army regulars, the Canadian militia and members of Captain Raunchey's Company of Coloured Men as well as First Nation allies.
Given the fort's location on the U.S. Canada border, it became the scene of much action during the war.
In October 1812, th fort was the subject of bombardment by heated shots from American forces at Fort Niagara as a diversion for the American attack on nearby Queenston Heights. This bombardment, as well as another one in November of that year, caused the destruction of several structures in the fort.
After Isaac Brock's death at Queenston Heights, he was buried in a military funeral at Fort George's northeast bastion.
--Brock-Perry
(The Brock in the signoff Brock-Perry is there for Isaac Brock.)