International borders have always been centers of conflict, and the U.S.-Mexican border is no exception. With the European colonizing the New World, it was a matter of time before the powers collided. The Spanish settled what is today Mexico, while the English settled what is to day the United States. When the two colonial powers did meet what is today the United States" Southwest, it was not England and Spain. Rather the two powers were the United States and Mexico. Both Counties had broken off from their mother countries. The conflict that erupted between the two countries where a direct...
the region brought the land at a cheap price. The selling of the Gasden Purchase was the down fall of President Santa Ana, and led to his replacement.

The conflicts along the border region were a direct result of U.S. expansion policies and Mexican fear for the United States. The Americans saw Manifest Destiny, westward expansion, as there God given right. The United States proved often that it supported policy of expansion. With the Mexican-American war, the United States completed it"s Manifest Destiny. The United States completed Manifest Destiny at the cost of the Mexican government and its people.