Starting at about age 15 during the French and Indian War (part of the Seven Years' War), Brant took part with Mohawk and other Iroquois allies in a number of British actions against the French in Canada: James Abercrombie's 1758 expedition via Lake George that ended in utter defeat at Fort Carillon; Johnson's 1759 Battle of Fort Niagara; and Jeffery Amherst's 1760 expedition to Montreal via the St. Lawrence River. He was one of 182 Native American warriors awarded a silver medal from the British for his service.