answers: 1769
context: presence. A fort and mission were established in 1769, which gradually expanded into a settlement under first Spanish and then Mexican rule. San Diego officially became part of the U.S. in 1848, and the town was named the county seat of San Diego County when California was granted statehood in 1850. It remained a very small town for several decades, but grew rapidly after 1880 due to development and the establishment of multiple military facilities. Growth was especially rapid during and immediately after World War II. Entrepreneurs and boosters laid the basis for an economy based today on the military, </s> los Angeles through extensive research. Mason, one of three founders of the Los Angeles Historical Society, authored six books and several articles regarding the early history and cultures around Southern California and he is credited with helping to uncover the ethnic facts about the original families of Los Angeles. The official foundation date of Los Angeles is September 4, 1781, when tradition has it the forty-four "pobladores" gathered at San Gabriel Mission along with two priests from the Mission and set out with an escort of four soldiers for the site that Father Juan Crespí had chosen over a decade </s> disapproval from the mission priests. Zúñiga's party arrived at the mission on 18 July 1781. Because they had arrived with smallpox, they were immediately quarantined a short distance away from the mission. Members of the other party would arrive at different times by August. They made their way to Los Angeles and probably received their land before September. The official date for the founding of the city is September 4, 1781. The families had arrived from Mexico earlier in 1781, in two groups, and some of them had most likely been working on their assigned plots of land since the
question: when was the city of san diego founded