The northern two in this sisterhood of Northwestern States were the first to be entered by the French, but latest by the English settlers. Why Michigan was not occupied by New York men at an earlier period is at first sight not easy to understand. Perhaps the adverse reports of surveyors who visited the interior of the State, the partial geographical isolation, and the unprogressive character of the French settlers account for the tardy occupation of the area. Certain it is that while the southern tier of States was sought by swarms of settlers, Wisconsin and Michigan still echoed to Canadian boating-songs, and voyageurs paddled their birch canoes along the streams of the wilderness to traffic with the savages. Great Britain maintained the dominant position until after the War of 1812, and the real center of authority was in Canada. But after the digging of the Erie Canal, settlement began to turn into Michigan. Between 1830 and 1840 the population of the State leaped from 31,000 to 212,000, in the face of the fact that the heavy debt of the State and the crisis of 1837 turned from her borders many of the thrifty, debt-hating Germans. The vast majority of the settlers were New Yorkers. Michigan is distinctly a child of the Empire State. Canadians, both French and English, continued to come as the lumber interests of the region increased. By 1850 Michigan contained nearly 400,000 inhabitants, who occupied the southern half of the State. But she now found an active competitor for settlement in Wisconsin. In this region two forces had attracted the earlier inhabitants. The fur-trading posts of Green Bay, Prairie du Chien, and Milwaukee constituted one element, in which the French influence was continued. The lead region of the southwest corner of the State formed the center of attraction for Illinois and Southern pioneers. The soldiers who followed Black Hawk's trail in 1832 reported the richness of the soil, and an era of immigration followed. To the port of Milwaukee came a combined migration from western New York and New England, and spread along the southern tier of prairie counties until it met the Southern settlers in the lead region. Many of the early political contests in the State were connected, as in Ohio and Illinois, with the antagonisms between the sections thus brought together in a limited area.