[Excerpt] On January 1, 1930, several hundred Mexican and Filipino lettuce workers in Brawley, California, walked off their jobs in a spontaneous protest against declining wages and intolerable working conditions. In less than a week they were joined by 5,000 other field workers, and the impromptu walkout of Imperial Valley lettuce workers turned into a serious strike, ushering in a decade of farmworker militancy that sent tremors throughout California's powerful agricultural establishment.