"From April 25, 1846 to September 14, 1847, the United States and Mexico went to war. It was a major event for both nations, changing a continent and forming a new identity for its peoples. "

This was exactly what we were looking for because this war was the begining of how the border started. Without this war maybe the U.S. & mexico would be conected? or who knows what could have happen but this war took a very large roll on what the U.S. & Mexico is today.