3rd Regiment of Artillery
| 3rd Air Defense Artillery Regiment | |
|---|---|
 |
|
| Active | 1821 |
| Country |
 United States
|
| Branch |
 United States Army
|
| Type | Air defense artillery |
| Motto(s) | NON CEDO FERIO (yield not, strike). |
| Commanders | |
| Notable commanders |
Braxton Bragg Walker Keith Armistead |
| Insignia | |
| Distinctive unit insignia |  |
The 3rd Air Defense Artillery Regiment is an air defense artillery regiment of the United States Army first formed in 1821 as the 3rd Regiment of Artillery.
Constituted 1 June 1821 in the Regular Army as the 3d Regiment of Artillery and organized from existing units with headquarters at Fort Washington, Maryland
Four batteries of the Third U.S. Artillery were assigned to Fort Jefferson, Florida in 1869.
Regiment broken up 13 February 1901 and its elements reorganized and redesignated as separate numbered companies and batteries of Artillery Corps
Reconstituted 1 July 1924 in the Regular Army as the 3d Coast Artillery and organized (less Batteries C, F, and G) with headquarters at Fort MacArthur, California
(Batteries A and B inactivated 1 March 1930 at San Pedro and Fort MacArthur, California, respectively; Batteries A and F activated 1 July 1939 at Fort MacArthur, California, and Fort Stevens, Oregon, respectively; Batteries D and F inactivated 1 February 1940 at Fort Rosecrans, California, and Fort Stevens, Oregon, respectively; Battery B activated 1 July 1940 at Fort MacArthur, California; Batteries C, D, and F activated 2 December 1940 at Fort Rosecrans and Fort MacArthur, California; Battery G activated 1 June 1941 at Los Angeles, California; Battery G inactivated 29 August 1941 at Los Angeles, California; Battery G activated 14 February 1942 at Fort MacArthur, California)
Regiment broken up 18 October 1944 and its elements reorganized and redesignated as follows:
Headquarters and Headquarters Battery as Battery B, 521st Coast Artillery Battalion
1st, 2d, and 3d Battalions as the 520th, 521st, and 522nd Coast Artillery Battalions, respectively
After 18 October 1944 the above units underwent changes as follows:
Battery B, 521st Coast Artillery Battalion, disbanded 15 September 1945 at Fort MacArthur, California
Reconstituted 28 June 1950 in the Regular Army and redesignated as Headquarters and Headquarters Battery, 3d Antiaircraft Artillery Group Activated 11 June 1951 at Camp Stewart, Georgia Redesignated 20 March 1958 as Headquarters and Headquarters Battery, 3d Artillery Group. Inactivated 15 December 1961 at Norfolk, Virginia
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