This was largely a political maneuver of little practicality, as the English then had no presence in the region whatsoever, the French and their Algonquian allies being the dominant force in the area. A writer in 1718 noted at the Was had a village in Chicago, but had recently fled due to concerns about approaching Ojibwes and Pottawatomis. The Iroquois and Meskwaki probably drove out all Miami from the Chicago area by the end of the 1720s. The Pottawatomi assumed control of the area, but probably did not have any major settlements in Chicago. French and allied use of the Chicago portage was mostly abandoned during the 1720s because of continual Native American raids during the Fox Wars. There was also a Michigamea chief named Chicago who may have lived in the region. In the 1680s, the Illinois River was called the Chicago River. First non-native settlements The first settler in Chicago was Jean Baptiste Point du Sable, a free black man, who built a farm at the mouth of the Chicago River in 1790. He left Chicago in 1800. In 1968, Point du Sable was honored at Pioneer Court as the city's founder and featured as a symbol. In 1795, following the Northwest Indian War, some Native Americans ceded the area of Chicago to the United States for a military post in the Treaty of Greenville. The US built Fort Dearborn in 1803 on the Chicago River. It was destroyed by Indian forces during the War of 1812 in the Battle of Fort Dearborn, and many of the inhabitants were killed or taken prisoner. The fort had been ordered to evacuate. During the evacuation soldiers and civilians were overtaken near what is today Prairie Avenue. After the end of the war, the Potawatomi ceded the land to the United States in the 1816 Treaty of St. Louis. (Today, this treaty is commemorated in Indian Boundary Park.) Fort Dearborn was rebuilt in 1818 and used until 1837. Growth of the city In 1829, the Illinois legislature appointed commissioners to locate a canal and lay out the surrounding town. The commissioners employed James Thompson to survey and plat the town of Chicago, which at the time had a population of less than 100. Historians regard the August 4, 1830, filing of the plat as the official recognition of a location known as Chicago. Yankee entrepreneurs saw the potential of Chicago as