The Mexican-American war fought between 1846 and 1848 remains a topic of much contention amongst modern historians. Differing accounts and conclusions of the war are often presented and one must remain pragmatic when analysing both primary and secondary sources regarding the war. There is a clear time line of events that led to the outbreak of the war, but there is one major event, and one minor action, which directly resulted in the declarations of war on both sides of the conflict between Mexico and the United States. Most scholars agree that the annexation of the Republic of Texas by the United States in 1845 set the stage for hostilities, but was not necessarily the spark that ignited the violence between the two nations. There was support for the war on both sides of the conflict, which tends to blur the notion of one nation being the aggressor over the other, but this essay will highlight motivations behind the war from both sides and will argue that U.S. economic ambitions and not Manifest Destiny played the most significant role in creating the Mexican-American War.
The origins of the Mexican-American war can ostensibly be immediately traced back to the westward movement of American settlers and the annexation of Texas in 1936. The Mexican-American war was a conflict that was precipitated by various interest groups in the United States. The reasons why these interest groups desired war are reflected in the aftermath of the war. This aftermath was a major US victory, which resulted in the annexation of a huge portion of land, covering the current states of California, Nevada, New Mexico, Utah and most of Arizona. These areas were annexed because they would have benefited the United States from an economical and strategic point of view, and they could be colonized the easiest without having American