The war with Mexico came at a time when much of the country had strong feelings of manifest destiny. Manifest destiny is the belief that fate had preordained the US to expand from the Atlantic to the Pacific oceans and from Canada to the Rio Grande river. This idea which was coined by John O' Sullivan was very popular in the 1840's. This ideal had strong influence and was one reason that their was so much popular support for the US expansion west. This ideal while nationalistic did not give us the right to go into Mexico and seize l

and which was rightfully theirs in the first place. They had the right to expel any US citizens that were living on their country's land especially if they where not abiding by their laws. This alone makes even the annexation of Texas not completely just. The US vision of manifest destiny helped to win the public's support for the Mexican war. Yet the public was misled by this sense of manifest destiny and those that did support it supported an unjust war.

To conclude the United States was unjust in its declaration of war on Mexico in 1846. The US was clouded with dreams of Manifest Destiny. It had a president that was obsessed with fulfilling campaign promises and greed for new land. Also Polk was looking for revenge for the denial of the proposal for buying California as was evident in his original reasons for declaring war on Mexico. Also the US provoked this boarder dispute into the two-year war that it became by purposely inciting the Mexicans into a fight. All these reasons are the evidence that the US was not justified in declaring war on Mexico.

Quite possibly the strongest of all reasons that the US was unjust in going to war with Mexico in 1846 was that the US forces were in the disputed territory too purposely

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Approximate Word count = 837
Approximate Pages = 3 (250 words per page double spaced)