B. L. Crumley, "The Marine Corps: Three Centuries of Glory", Jan 19, 2013. The total breaks down as follows: 361 artillery pieces of 75 mm caliber or larger, 12 320 mm spigot mortars, 65 medium and light mortars, 33 naval guns, 94 anti-aircraft guns of 75 mm or larger, 200+ anti-aircraft guns of 20 mm or 25 mm, and 69 37 mm or 47 mm anti-tank guns.
