The region grew based on the lucrative fur trade, in which numerous Native American people had important roles. Detroit's city flag reflects its French colonial heritage. (See Flag of Detroit). Descendants of the earliest French and French Canadian settlers formed a cohesive community who gradually were replaced as the dominant population after more Anglo-American settlers came to the area in the early 19th century. Living along the shores of Lakes St. Clair, and south to Monroe and downriver suburbs, the French Canadians of Detroit, also known as Muskrat French, remain a subculture in the region today.