Following the Mexican-American War, what significant territory did the U.S. gain?

• A. Alaska
• B. The Oregon Territory
• C. The California Territory
• D. The Louisiana Purchase

Answer: (C)

The correct choice highlights the significant territorial gain of California following the Mexican-American War, which took place between 1846 and 1848. As a result of this conflict, the Treaty of Guadalupe Hidalgo was signed in 1848, leading to substantial land acquisitions for the United States. The California Territory, which became an integral part of the United States, was vital for several reasons, including its resources, strategic location, and subsequent role in the Gold Rush of 1849, which attracted a massive influx of settlers and economic development. This expansion also played a crucial role in the fulfillment of the idea of Manifest Destiny, the belief that the U.S. was destined to expand across the North American continent.

The other choices do not pertain to the gains made directly as a result of the Mexican-American War. Alaska was purchased from Russia in 1867, The Oregon Territory was obtained through negotiation and settlement prior to the war, and the Louisiana Purchase occurred in 1803, long before the conflict with Mexico.