Most Americans were advocates of expanding the Union to make a larger stronger country, but some also saw the Mexican War as a barefaced plot to expand slavery; however, the Mexican War was seen as something that was necessary to settle disputes between the two countries, and through the support of the "Manifest Destiny," the unresolved conflict that took place between the Texans and Mexicans in the early 1800's, and Polk's failed attempts for peace between Mexico and the United States, it can be proved that the Mexican War was in the National interest.

"Manifest Destiny" was the spirit that prevailed in American life during the 1840's where Americans believed that they were pre-ordained to expand the territorial borders of the United States from the Atlantic to the Pacific Ocean and from Canada to the Rio Grande River. "It is the right of our manifest destiny to overspread and to possess the whole of the continent"; therefore, annexing Texas was justified (Document B). The Mexicans were "miserable"

Causes of the Mexican War began when Texas was settled by Americans led by Stephan Austin in the early 1800's; these Texans declared their independence from Mexico's over- controlling government and stated that they wanted to be part of the Union. The seizure of the Alamo sparked Americans to help Texans in their fight against Mexico for their land. Again, when the prospect of war arose for the Americans, "Remember the Alamo" launched those Americans in their fury against Mexico. After Polk was elected in 1845, Texas was annexed and became part of the Union on February 28; however, the problem with Mexico did not stop, actually, they had just began. The questioning of the border of Texas being the Rio Grande or the Nueces River justified the Americans to go to war to fight for their rightful territory between the two rivers. Without declaring war, the United States would lose their rightful territory through the manifest destiny.

"Manifest destiny" enlightened Americans to their right of land. It was the justification for the war that the Mexicans cou

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Approximate Word count = 714
Approximate Pages = 3 (250 words per page double spaced)