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The war officially began over a border dispute in what is now south Texas, but President James K. Polk had a larger goal in mind – the acquisition of Mexico’s northern territories of Alta California and Nuevo México.

President Polk initially planned a limited war, but Mexico’s stubborn refusal to part with its northern territories led to a decision to invade and conquer Mexico City.     MORE DOWN HERE SCROLL

Mexico lost 55% of its territory to the United States between 1836 and 1848.

The U.S. Army won every major battle in the war, but it was unable to suppress guerrilla activity, which never ceased.  This was America’s first counter-insurgency war in a foreign country.

Mexicans civilians suffered from the U.S. occupation, whether from personal violence, extended anti-guerrilla operations, bombardment of cities, or the imposition of martial law.  U.S. military forces remained in Mexico from May 1846 until July 1848.

Of the 90,000 U.S. soldiers who served in Mexico, nearly 14,000 died, a death rate of 15.5% – the highest rate of any foreign war in U.S. history.

Regarding the causes of death, one U.S. soldier in seven died in battle or from battle wounds; six in seven died from disease, accidents, or other causes.

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