James K. Polk led the United States into which war that expanded U.S. territory in the 1840s?

James K. Polk led the United States into which war that expanded U.S. territory in the 1840s?

• A. Mexican-American War
• B. War of 1812
• C. Spanish-American War
• D. Civil War

Answer: (A)

This question tests how expansion driven by a president and a specific war reshaped the United States in the 1840s. James K. Polk pursued a path of territorial growth, pushing for Texas annexation and a confrontation with Mexico to gain more land. The war that followed began in 1846 and ended in 1848, with the United States winning a decisive victory. The result, the Treaty of Guadalupe Hidalgo, opened the way for the U.S. to acquire a large swath of territory—California, Nevada, Utah, Arizona, New Mexico, and parts of Colorado and Wyoming—dramatically expanding the nation’s borders in that decade. The other wars listed occurred in different times or contexts (the War of 1812 earlier, the Spanish-American War in 1898, and the Civil War starting in 1861), so they don’t fit the pattern of 1840s territorial expansion caused by Polk’s leadership.

This question tests how expansion driven by a president and a specific war reshaped the United States in the 1840s. James K. Polk pursued a path of territorial growth, pushing for Texas annexation and a confrontation with Mexico to gain more land. The war that followed began in 1846 and ended in 1848, with the United States winning a decisive victory. The result, the Treaty of Guadalupe Hidalgo, opened the way for the U.S. to acquire a large swath of territory—California, Nevada, Utah, Arizona, New Mexico, and parts of Colorado and Wyoming—dramatically expanding the nation’s borders in that decade. The other wars listed occurred in different times or contexts (the War of 1812 earlier, the Spanish-American War in 1898, and the Civil War starting in 1861), so they don’t fit the pattern of 1840s territorial expansion caused by Polk’s leadership.