 The unit was mustered out on October 21, 1866.The lineage of the 1st California continued with the formation of the Coast Artillery Corps (CAC), California National Guard (CANG) on 19 April 1909.Subsequently, this unit was redesignated as the 1st Coast Defense Command (CDC) (1917), 1st Provisional Battalion, CAC, CANG (date unknown), 1st CDC (1921), 250th Coast Artillery (1923), and in 1924 became the 250th Coast Artillery Regiment (Tractor Drawn), which served in World War II.