During the mexican war The American Navy dominated the sea. In Mexico, the war worsened domestic political turmoil and led to a loss of national prestige, as it suffered large losses of life in both its military and civilian population, had its financial foundations undermined, and lost more than half of its territory. The American government provided stable, capable leadership. By 1848, the United States encompassed much of North America, a republic that stretched from the Atlantic to the Pacific. Following the capture of Mexico City in September 1847, Nicholas Trist, chief clerk of the Department of State and Polk’s emissary to the Mexican Government started negotiations for a peace treaty. Nov 9, 2009 ยท The Mexican-American War was a 1846-1848 conflict over vast territories in the American West, which the Treaty of Guadalupe Hidalgo gave to the United States. When war broke out against Mexico in May 1846, the United States Army numbered a mere 8,000, but soon 60,000 volunteers joined their ranks. claim). President Polk fulfilled his promise by gaining Oregon and, most spectacularly, provoking a war with Mexico that ultimately fulfilled the wildest fantasies of expansionists. In Mexico, the war worsened domestic political turmoil and led to a loss of national prestige, as it suffered large losses of life in both its military and civilian population, had its financial foundations undermined, and lost more than half of its territory.
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