251st Air Defense Artillery Regiment

The 251st Coast Artillery was a coast artillery regiment in the California National Guard, constituted in 1924 as a harbor defense regiment for the 9th Artillery District and re-designated in 1930 as an antiaircraft regiment. It served in World War II in that capacity.

251st Air Defense Artillery Regiment

The 251st Coast Artillery was a coast artillery regiment in the California National Guard, constituted in 1924 as a harbor defense regiment for the 9th Artillery District and re-designated in 1930 as an antiaircraft regiment. It served in World War II in that capacity.