In the Bataan campaign, several U.S. Army units on the peninsula utilized the 3-inch anti-aircraft gun as part of the air defenses on the peninsula.
The Bataan Gun Defense Group of the Anti-Aircraft Defense Command was commanded by the Commanding Officer of the 2d Battalion, 60th CA (AA), with Battery G of the 2nd Battalion, code named “Globe,” equipped with four 3-inch guns. The parent unit, the 60th Coast Artillery Regiment (Anti-Aircraft), which was stationed in the Philippines, provided the anti-aircraft defense of the Manila Bay and Subic Bay areas, and the southern tip of Bataan.
They were soon joined by Battery C of the 91st Coast Artillery Regiment (Philippine Scouts), code named “Cebu.” The battery was assigned to Fort Wint, Grande Island, Subic Bay, in October, 1941, with four 3-inch guns, before redeploying to Bataan, where it was attached to 2nd Battalion, 60th CA (AA).
Another AA unit equipped with the 3-inch gun was the 200th Coast Artillery Regiment (AA), a federalized National Guard unit which arrived in the Philippines in September, 1941. It provided anti-aircraft defense for Clark Field and Fort Stotsenburg, was not attached to the Philippine Coast Artillery Command, before deploying to Bataan with 12 3-inch guns.
One other unit had 3-inch AA guns on Bataan, and that was the 1st Separate Marine Battalion, based at the Cavite Navy Yard. These 700 Marines were organized both as a defense and an infantry battalion, and fielded six AA batteries. The batteries were armed with 3-inch dual purpose guns, 3-inch anti-air craft guns, or .50-caliber machine guns. After leaving the Cavite area, Battery’s A (machine guns) and C were stationed on Bataan near Mariveles, where they were part of a naval defense battalion for the southern coast of Bataan. Battery C was composed of four 3-inch anti-aircraft guns with an ensign and 40 sailors. On February 17, 1942, Battery A moved over to Corregidor, leaving the 3-inch guns of Battery C as the only remaining Marine AA unit on the peninsula. The difficulties of operations after a prolonged period on reduced rations and inadequate medical supplies is reflected in this account “Disease became a problem for Battery C, as Lieutenant Simpson recalled, “the heat was terrific, malaria cropped out among the men every day or so, yet we had to stay manned every day all day because of constant enemy air activity” The battery often left one gun unmanned to have full crews on the remaining guns.” (Source: “FROM SHANGHAI TO CORREGIDOR: Marines in the Defense of the Philippines,”
by J. Michael Miller, at: http://www.nps.gov/history/history/online_books/npswapa/extcontent/usmc/pcn-190-003140-00/sec13.htm)
Details for the achievements of these 3-inch AA gun units on Bataan are not easy for this blog editor to find, but there is the account of the wartime operations of Battery C, 91st CA (PS), aka “Cebu,” which is telling:
“Battery C was commanded by Captain John Gulick. His father was Chief of the Coast Artillery for several years during the 1930’s. Guardalope Datoc was the First Sergeant. The Battery was given the code name Cebu and remained on Ft. Wint until the Fort was abandoned on December 26, 1941. It moved to San Jose Barrio, Bataan, near Dinalupihan. Several days later, it moved near Bataan Field and was attached to the 2d Battalion, 60th Coast Artillery. On January 7, it moved to Cemetery Ridge and on February 7, it moved about 100 yards further west. During this time, the Battery engaged Japanese planes attacking Corregidor, Mariveles and the airfields under construction. It shot down two planes while on Ft. Wint, two planes at Dinalupihan, one plane at Bataan Field and 10 while near Cemetery Ridge for a total of 15 confirmed kills. When Bataan Surrendered, the Battery escaped to Corregidor. It was assigned to man Batteries Morrison and Grubbs. After several artillery duals, both of these Batteries were put out of commission. Then Battery C was assigned two 155mm GPF guns located by the Quartermaster warehouses on Topside. One gun was defective, but the second fired a significant number of rounds at Japanese artillery on Bataan.” (Source: The Best of The Best (91st Coast Artillery, Philippine Scouts), A Short History,” by George Munson, posted at: http://corregidor.org/chs_munson/91st.htm)
When Bataan fell in early April, 1942, Globe with two guns managed to evacuate to Corregidor, accompanied by the personnel from Cebu. The 200th CA (AA), however, was surrendered on Bataan on April 9, 1942, as were members of USMC Battery C.