 In 1684, he participated in the peacekeeping mission of the Governor Lefebvre de La Barre and succeeded in bringing the warriors of several nations together to sign a peace treaty.In the spring of 1685 he was appointed Commandant-in-Chief of Bais Des Puants (present-day Green Bay, Wisconsin) and the neighboring regions when war broke out between the Fox tribe and the Sioux and Chippewa tribes.He worked hard to bring about peace, and was successful, at least for a time.