The Treaty of Guadalupe Hidalgo

The thing I learned today is that The Treaty of Guadalupe Hidalgo granted, via the Mexican Cession, the US the region that is now California, Nevada, New Mexico, and Arizona, as well as part of Wyoming. It came at the end of the Mexican-American war (1846-48). The Treaty provided for property rights of Mexicans in the area, which largely went unhonored.