The Battle of Hampden was an action in the British campaign to conquer present-day Maine and remake it into the colony of New Ireland during the War of 1812. Sir John Sherbrooke led a British force from Halifax, Nova Scotia to establish New Ireland, which lasted until the end of the war, eight months later. The brief life of the colony yielded customs revenues which were subsequently used to finance a military library in Halifax and found Dalhousie College.