<P> New France's Governor - General Roland - Michel Barrin de La Galissonière was concerned about the incursion and expanding influence in the Ohio Country of British colonial traders such as George Croghan . In June 1747, he ordered Pierre - Joseph Céloron to lead a military expedition through the area . Its objectives were: </P> <Ul> <Li> to reaffirm to New France's Indian allies that their trading arrangements with colonists were exclusive to those authorized by New France </Li> <Li> to confirm Indian assistance in asserting and maintaining the French claim to the territories which French explorers had claimed </Li> <Li> to discourage any alliances between Britain and local Indian tribes </Li> <Li> to impress the Indians with a French show of force against British colonial settler incursion, unauthorized trading expeditions, and general trespass against French claims </Li> </Ul> <Li> to reaffirm to New France's Indian allies that their trading arrangements with colonists were exclusive to those authorized by New France </Li> <Li> to confirm Indian assistance in asserting and maintaining the French claim to the territories which French explorers had claimed </Li>

Who wrote the letter demanding the french leave the area