 In 1779 , Brant visited Montreal , where some of her children attended school , but headed back when the Americans began their invasion of Iroquoia that year . Because of the war , she could only get as far as the British post at Carleton Island , where many Iroquois refugees had fled from the Americans . There she continued her work as an intermediary . The British commander considered Brant 's influence " far superior to that of all their Chiefs put together " . Brant was unhappy with having to live in an army barracks with her children . Hoping to keep her favor , the British built her a house on the island in 1781 , where she lived with her children and four slaves for the remainder of the war . Throughout the war , Brant played important roles as a negotiator , mediator , liaison , and advocate for Mohawk and Iroquois peoples at Fort Niagara , Montreal , and Carleton Island . 
