1839 - 1839
07-01-1839 – Swiss-born John Augustus Sutter arrives in Yerba Buena and becomes a Mexican citizen.
Late 1830’s – Illegal immigrants from the United States move into Northern California in large numbers over the Oregon Trail.
07-01-1839 – Swiss-born John Augustus Sutter arrives in Yerba Buena and becomes a Mexican citizen.
Late 1830’s – Illegal immigrants from the United States move into Northern California in large numbers over the Oregon Trail.