Unofficial 12th Defense Battalion insignia from 1980 Reunion pamphlet
Active
1 Aug 1942[1] – 22 Sep 1945[2]
Country
United States of America
Branch
United States Marine Corps
Type
Air Defense/Coastal Defense
Size
~1000 men
Part of
I Marine Amphibious Corps[3]
Engagements
World War II
Operation Chronicle
Battle of Cape Gloucester
Battle of Peleliu
Commanders
Current commander
N/A
Notable commanders
William H. Harrison (USMC)
Military unit
The 12th Antiaircraft Artillery Battalion (12th AAA Bn) was a United States Marine Corps antiaircraft unit that served during World War II. Formed in 1942 as the 12th Defense Battalion, its original mission was providing air and coastal defense for advanced naval bases. During the war the battalion defended the Russell Islands and took part in combat operations at Woodlark Island, Cape Gloucester, and Peleliu. The battalion remained on Peleliu for the duration of the war and was finally decommissioned on Guam on 22 September 1945.
^Rottman 2002, pp. 212.
^Rottman 2002, pp. 217.
^Rottman 2004, pp. 28.
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Global Information
United States of America
United States Marine Corps