Explorer, interpreter, fur trader and diplomat, French-born Perrot played an important role in the establishment and protection of New France's western frontier during the last four decades of the 17th century. In 1671 he was with Saint-Lusson at Sault Ste. Marie to take formal possession of the upper lakes region for France and he later established a French presence in the upper Mississippi Valley. He wielded considerable influence among the Indian nations of these regions and on a number of occasions was able to enlist their support in defence of New France against the Iroquois. *Note: This designation has been identified for review. A review can be triggered for one of the following reasons - outdated language or terminology, absence of a significant layer of history, factual errors, controversial beliefs and behaviour, or significant new knowledge.