It was the garrison of the Harbor Defenses of Galveston in World War II , with Battery C deployed to Tongatapu , Tonga March - August 1942 .
The 20th Coast Artillery Regiment was a Coast Artillery regiment in the United States Army .
20th Coast Artillery Regiment was the garrison of the Harbor Defenses of Galveston in World War II , with Battery C deployed to Tongatapu , Tonga March - August 1942 .
The 20th Coast Artillery Regiment was a Coast Artillery regiment in the United States Army .