http://www.history.com/topics/daniel-webster
http://www.buffalosoldiers-amwest.org/history.htm
http://www.ushistory.org/us/41b.asp
https://www.apstudynotes.org/us-history/topics/cattle-frontiers-and-farming/
http://www.ducksters.com/history/westward_expansion/cowboys.php
http://www.buffalosoldiers-amwest.org/history.htm
http://www.ushistory.org/us/41b.asp
https://www.apstudynotes.org/us-history/topics/cattle-frontiers-and-farming/
http://www.ducksters.com/history/westward_expansion/cowboys.php