George Stewart was a Lieutenant-Colonel in the Dominion forces. He was a resident of Courtright and also owned about 700 acres of land in Moore Township. His military career began during the Fenian Raids in 1866, when he raised a troop of cavalry of 70 men, stationed in Mooretown.
The Fenian Brotherhood, composed of Irish-Americans, sought to achieve Irish independence from Britain. The group aimed to put pressure on Britain by raiding the colony of Canada West from 1866 to 1871.
When George was retired from service in 1894, he was given the title of Lieutenant-Colonel by the Canadian government.