Surname1Student’s Name Instructor’s NameCourseDateManifest Destiny and DisunionUndeniably, President Polk played a significant role in provoking the war withMexicans in 1846. In 1845 during his early days in office, California's acquisition was one ofhis main agendas. Many historians identify Polk as a typical representation of theexpansionist impulse recognized for the manifest destiny. Tension grew between America andMexico in the 1840s as the United States expansionist frontrunners targeted the Mexican landto the western side, including California's northern province. Therefore, such a desire toconquer the province was one of the significant factors that provoked the war. As a matter offact, in 1842, the United States naval troop, who miscalculated the war, had begun to seizethe Monterey (California), which was part of Mexico. However, the following day Montereywas returned, but the attempt created increased uneasiness and tension on how the Mexicanperceived their neighbours. The expansion forces could not be accommodated, making theAmerican elect James Polk in 1844 because he promised to deliver more land. The presidentkept his words by capturing Oregon and hence provoked the war. Hence Polk played a centralrole in provoking the war. The treaty of Guadalupe Hidalgo, which took effect in 1848, endedthe Mexican-American war. The treaty favoured the Americans, which was not fair to theMexicans, hence threatening the civil war. The war had commenced two years earlier in1846, over a territorial dispute in Texas's ownership.The treaty's effects included the addition of 525,000 miles to the US possession,including the square miles that makes up present-day Nevada, Colorado, Arizona, NewMexico, Wyoming, California, and Utah. Besides, Mexico was prompted to forgo all claimson such territories and recognized the Rio Grande as the southern border. The treaty wasdefeated with a significant margin in the United States Congress since its effects wouldimpact free slave states and the free state's balance between the southerners and thenortherners hence threatening and risking war with Mexico, which was already antagonisticwith America. However, before quitting office and President Polk's barking, Zachary Taylormanaged to strike a congressional consensus. While Mexico did follow with the civil war'sactual threat, the relation between them and the US remained tense over border disputes,hence threatening the civil war. The question and concerns over slavery were mainlyperceived as a southern issue due to ownership of large plantations and agricultural fields.