Landforms in the United States and Canada
Watch this video. Pay attention to the roles the St. Lawrence, Hudson, and Mississippi rivers, the Great Lakes, and the Welland, Erie, and Illinois and Michigan canals played in accelerating settlement and trade into the U.S. interior.
Please note these corrections. At 7:08, Rueschhoff meant to say that the Mississippi River generally flows straight south from its headwaters in Minnesota to the Gulf of Mexico. At 7:57, he meant to say that the Rio Grande River serves as the border between the United States and Mexico (not Canada). Note that Rio means "river" in Spanish, so we should call this waterway the Rio Grande.
Source: Rueschhoff Teaches, https://www.youtube.com/watch?v=h8kuMKbun08
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