18th Coast Artillery (United States)
| 18th Coast Artillery Regiment | |
|---|---|
| Active | 1940 - 1944 |
| Country |
 United States
|
| Branch | Army |
| Type | Coast artillery |
| Role | Harbor defense |
| Size | Regiment |
| Part of |
|
| Garrison/HQ |
|
| Motto(s) | "Tam Marte Quam Minerva" (As much by the pen as the sword) |
| Mascot(s) | Oozlefinch |
The 18th Coast Artillery Regiment was a Coast Artillery regiment in the United States Army. It was the Regular Army component of the Harbor Defenses of the Columbia, replacing the 3rd Coast Artillery there. Other elements of the regiment were also part of the Harbor Defenses of San Francisco. The regiment was active from 1940 until withdrawn in April 1944 and inactivated the following month as part of an Army-wide reorganization.
Constituted as the 18th Artillery (Coast Artillery Corps) (C.A.C.) and organized October 1918 at Fort Winfield Scott, California, but demobilized in December 1918. This was one of a number of Coast Artillery regiments mobilized to operate heavy and railway artillery on the Western Front in World War I, but the Armistice resulted in the dissolution of the 18th.
Constituted in the Regular Army 19 January 1940 as 18th Coast Artillery (Harbor Defense) (HD), and organized 1 February 1940 at Fort Stevens. Regimental HHB, 1st Battalion HHB, and Batteries A and B were organized 1 February 1940 by redesignating HHD, Btrys E and F, and Panama Detachment, 3rd Coast Artillery (HD) Regiment, Fort Stevens.
World War II
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