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.

Lineage

Constituted 1 November 1924 in the California National Guard as the 251st Coast Artillery as follows-
As a harbor defense unit, until 1930 the 251st was the California National Guard component of the harbor defenses of Los Angeles and HD San Diego ; parts of the 3rd Coast Artillery Regiment were the regular army components of these defenses.
Redesignated and reorganized as 251st Coast Artillery 1 January 1930.
Arrival of the regiment in Fiji was reported on 1 June 1942, "more than doubling the anti-aircraft defenses of Fiji."
Regiment broken up at Bougainville 1 March 1944 as follows-
The 746th Antiaircraft Artillery Gun Battalion moved to the Philippines on 9 January 1945, returned to San Francisco Port of Embarkation 13 January 1946, inactivated 15 January 1946 at Camp Stoneman, California.
The 951st Antiaircraft Artillery Automatic Weapons Battalion moved to the Philippines on 9 January 1945, returned to San Francisco for inactivation 26 December 1945.
The 251st Antiaircraft Artillery Group departed Bougainville on 11 December 1944, stopped at Lae, New Guinea and Manus, Admiralty Islands, arriving at Lingayen Gulf, Philippines on 9 January 1945. Moved to Manila 8 March 1945; returned to San Francisco 26 December 1945 and inactivated at Camp Stoneman 29 December 1945.
Later the regiment became an air defense artillery regiment, and was equipped with the Nike-Hercules missile. Elements which were to become part of the 251st Air Defense Artillery were under control of the Regular Army's 47th Artillery Brigade, part of Army Air Defense Command. The brigade's command post was at the Fort MacArthur Direction Center in San Pedro, Los Angeles. In May 1959, the 720th ADA Battalion was redesigned as the 4th Missile Battalion 251st Artillery, California Army National Guard.
The lineage of the regiments headquarters company continues on in the form of the headquarters company of the 79th Infantry Brigade Combat Team.

Distinctive unit insignia

A Gold color metal and enamel device in height overall consisting of a shield blazoned: Or, six pallets couped Gules, a ship of Cabrillo’s time Argent; on a canton Azure a fleur-de-lis encircled by a garland of laurel of the first. Attached below and to the sides of the shield a Red scroll inscribed “WE AIM TO HIT” in Gold letters.
The shield is red for Artillery. The six pallets couped produce a diminished bordure effect on the shield and represent the six batteries comprising the Regiment at the time of its organization. The ship is a representation of the ship of Don Juan Rodrigues Cabrillo, a Portuguese, who discovered San Diego Harbor. The charges on the canton, the fleur-de-lis encircled by a garland of laurel, are taken from the coat of arms of the 250th Coast Artillery, as Batter B of the 251st Coast Artillery, California National Guard, is a descendant of Batter F of the 250th Coast Artillery, California National Guard which served during World War I as B Battery of the 65th Coast Artillery.
The distinctive unit insignia was originally approved for the 251st Coast Artillery on 9 January 1928. It was amended to add the motto on 16 June 1928. It was redesignated for the 746th Antiaircraft Artillery Gun Battalion on 7 January 1952. The insignia was redesignated for the 251st Artillery Regiment on 16 February 1961. It was redesignated for the 251st Air Defense Artillery Regiment on 10 July 1972.

Awards

In 1936, the regiment was awarded the Coast Artillery Association Trophy.

Campaign streamers

World War II
251st CA : Central Pacific and Northern Solomons
251st AAA Group: Luzon, Philippines