The Mexican–American War

AP US History· difficulty 3/5

"Other nations have undertaken... to thwart our policy and hamper our power... in the avowed object of... checking the fulfillment of our manifest destiny to overspread the continent allotted by Providence for the free development of our yearly multiplying millions." — John L. O'Sullivan, "Annexation," July-August 1845

U.S. Territorial Expansion 1803–1848 Original U.S. (1783) Louisiana Purchase 1803 Florida 1819 Texas 1845 Oregon 1846 Mexican Cession 1848

The expansionist sentiment expressed here contributed most directly to which subsequent conflict?

  • A

    The Aroostook War of 1838-1839

  • B

    The Mexican-American War of 1846-1848

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  • C

    The Black Hawk War of 1832

  • D

    The Patriot War of 1837-1838

Explanation

Manifest destiny rhetoric backed Texas annexation and disputed Mexican border claims, leading President Polk to provoke and prosecute the Mexican-American War to acquire vast western territory.

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