U.S. Marine Corps WWII-era coastal defense battalions
3rd Defense Battalion with a 90 mm antiaircraft gun at Guadalcanal
A Marine Defense Battalion with a 5"/51 caliber gun for coast defense at Guantanamo Bay, Cuba
155 mm Long Tom gun "Scorpion" of the 4th Marine Defense Battalion at Barakoma Airfield on Vella Lavella in the South Pacific.
Marine Defense Battalions were United States Marine Corps battalions charged with coastal and air defense of advanced naval bases during World War II. They maintained large anti-ship guns, anti-aircraft guns, searchlights, and small arms to repel landing forces.
