01-24-1848 – Gold is discovered at Sutter’s Mill near Sacramento.
02-01-1848 – The Gold Rush had a devastating impact on the remaining California Indians. Disease, starvation, and genocidal attacks reduce the Native population to an estimated 31,000 by the 1870 census.
02-02-1848 – The Treaty of Guadalupe Hidalgo cedes California (and parts of what today comprise the States of Arizona, Nevada, Utah, Wyoming, Colordao, and New Mexico) to the United States was concluded.
1848-1855 – Over 300,000 settlers pour into California during the Gold Rush.