The Treaty of Guadalupe-Hidalgo was a peace treaty signed in 1848 between the United States and Mexico that ended the Mexican-American War. The treaty established the Rio Grande as the border between the two countries and ceded the Mexican territories of Alta California and Santa Fe de Nuevo Mexico to the United States. In exchange, the United States paid Mexico $15 million and assumed responsibility for up to $3.25 million in claims by American citizens against the Mexican government. The treaty also granted Mexican citizens living in the ceded territories the right to become U.S. citizens.
