Final answer:
The Mexican-American War was ended by the signing of the Treaty of Guadalupe Hidalgo, which ceded territories to the United States.
Step-by-step explanation:
The Mexican-American War was ended by the signing of the Treaty of Guadalupe Hidalgo on February 2, 1848. This treaty was signed between the United States and Mexico, effectively ending the conflict between the two nations. One of the main provisions of the treaty was the cession of Mexican territories such as California, Arizona, New Mexico, and parts of Nevada, Utah, Colorado, and Wyoming to the United States. The signing of this treaty marked the conclusion of the Mexican-American War and solidified the United States' control over these territories.
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