Years of tensions between Filipino farm laborers and white Californians erupt into four days of riots beginning on this day in 1930.

Owners of large farms had favored hiring laborers from the Phillipines, especially when the immigration of other Asians was restricted by law. White laborers resent the Filipinos for their willingness to accept low wages. White men resent Filipinos for dating and marrying white women. Gangs of men start fighting in the streets of Watsonville, and white mobs in towns throughout the Monterey Bay area violently harrass immigrants and burn buildings associated with Filipinos. Local police eventually restore order, even as tensions flare in cities up the coast.

In four years, Filipino immigration is essentially outlawed.