The grito de dolores, or 'Cry of Dolores,' was a historic call to arms issued by Miguel Hidalgo y Costilla on September 16, 1810, initiating the Mexican War of Independence against Spanish colonial rule. This rallying cry not only marked the beginning of a significant struggle for independence but also symbolized the aspirations for social justice and political freedom among the Mexican people, including those in California as they sought to assert their rights and identity in a changing political landscape.