SAT Subject US History Practice Question 509: Answer and Explanation

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Question: 509

40. The United States acquired the last of the territory that would make up the contiguous United States during which decade?

A. 1770s
B. 1800s
C. 1840s
D. 1850s
E. 1950s

Correct Answer: D


The United States acquired the Southwestern land known as the Gadsden Purchase in 1854 during Franklin Pierce's presidency. This was six years after the Mexican-American War.

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