1840s
The Californios valiantly defended their territories against the Manifest Destiny expansion of the United States westward during the Mexican–American War. In Los Angeles, several battles were fought by the Californios. However in the end, the US came out victorious. Mexico signed the Treaty of Guadalupe Hidalgo, which gave Mexicans and Californios living in state certain unalienable rights. US government sovereignty in California began on February 2, 1848.
Read more about this topic: History Of Santa Monica, California