sentences:  The completion of the Erie Canal in 1821 caused a surge in immigration from New England to what was then the Northwest Territory.The end of the Black Hawk War in 1832 increased the immigration surge of immigration, again coming from New England as a result of overpopulation combined with land shortages in that region.Some of these later settlers were from upstate New York, whose relatives had moved to that region from New England shortly after the American Revolutionary War.