Order of Battle

Regimental HQ	Probably at the North Shore Road Tunnel between Rock Point and Cape Corregidor
Regimental C.O.	Col. Joseph P. Kohn (concurrent Groupment 4 Commander [all medium caliber batteries covering North Channel plus Mine Command])
Regimental X.O.	Maj. Floyd A. Mitchell
HQ & HQ Battery:	At Unit Command Station No. 10, Ft. Mills, with a 10-man detachment assigned to Ft. Frank.
C.O.:	(1) Capt. Bert B. Backstrom (until transferred to Battery B).
	(2) Maj. Lawrence A. Bosworth

1st BATTALION
C.O.:	LCol Carl E. Englehart (concurrent Mine group Commander).

2nd BATTALION
H.Q.;	at Unit Command Station No. 10.
C.O.:	Maj. Robert F. Haggerty (concurrent Mine Group X.O.).

Battery A:	Mine Planter Battery controlling outer minefield between Corregidor and Cochinos Point, Bataan. C.P. at Primary Fire Control Station at M'W, south of Battery Hanna. Additionally manned Battery Stockade (2-155mm guns) at Middleside, overlooking Engineer Dock. Had tactical command over 60-inch Searchlight No. 3 at Cheney ravine, about 100 yds south of M'W.
C.O.:	Capt. Richard A. Smith

Battery B:	Manned Batteries Roock Point (2-155mm guns), James (4-3" guns) commanded by 1Lt. Amadeo S. Garcia, 1st CA (PA), and Hanna (2-3" guns) commanded by Capt. Albert E. Durie. One 155mm gun from Rock Point later relocated as Roving Battery Ek, commanded by 1Lt. Karl L. Ek, Rock Pt. No. 1 gun Commander.
C.O.:	(1) Capt. William H. Owen, Jr. (until wounded in action 14 Aprril 1942.)
	(2) Capt. Bert B. Backstrom

Battery C
(1) Late 1941 to 25 Dec 1941:	assigned to Ft. Wint, Grande Island as AA Battery "CEBU" (4-3" AA guns) and also train Phil. Army units as AA Batteries.
(2) 25 to 29 December 1941:	(evacuated Wint with all armament, attached to 2nd Bn. 60th CA and initially assigned AA defenses near Dinalupihan, Bataan.
(3) 29 Dec. to 6 Feb 1942:	assigned AA defenses Bataan Field.
(4) 6 Feb to 8 April, 1942:	assigned AA defenses, Mariveles, Bataan.
(5) 8 April, 1942:	ordered return to parent organization, Ft. Mills.
(6) 9 April, 1942:	returned to Ft. Mills less armament: assigneed to man Battery Morrison (2-6" disappearing guns) on Morrison Hill, facing Bataan. Fired counterbattery until put out of action the same day.
(7)10 to 15 April, 1942:	Assigned to man Battery Grubbs (2-10" disappearing guns) at Topside until put out of action 15 April, 1942.
(8) 15 April to 6 May, 1942	Assigned to mqan two 155mm field artillery pieces in vicinity of Herring Field, Middleside, named "battery Gulick" after its Battery C.O.; one gun disabled by muzzle burst when first fired but second gun was in action until surrender at noon, 6 May, 1942.
C.O.:	Capt. John McM. Gulick.

Battery D:	Manned Battery Sunset (4-155mm guns) between Batteries Smith and Hanna at Topside. Two guns later removed and renamed Roving Batteries Byrne and Wright.
C.O.:	Capt. Jerome S. Byrne
X.O.	2Lt. John McN. Wright, Jr.

Battery E ("Ermita"):	Manned Battery Ermita (4-3" guns) at Ft. Frank.
C.O.:	Maj. Joe C. East

Battery F:	Manned Batteries Koehler (8-12" mortars), Crofton (1-14" disappearing gun), and Greer (1-14" disappearing gun) at Ft. Frank. Latter was never fired. Also 3-75 beach defense guns.
C.O.:	(1) Capt. Robert J. White, until mortally wounded by muzzle burst at Btry Koehler, 6 February, 1942.
	(2) Capt. John H. Davis, Jr.

Battery G:	Controlled inner minefield between Corregidor and Sisiman Pt., Bataan plus a number of beach defense 75mm guns along north shore of Topside and Middleside.
C.P.:	At M'E above and behind Battery James.
C.O.:	Maj. Erven C. Sommerville

ADDITIONAL:

ROVING BATTERY LEHR	2-155mm guns at Topside, Capt. Philip H. Lehr, Battery Commander and C.O. regimental Band.

NOTE:	All 155mm guns above were M1917/M1918 GPF on Panama Mounts, except tractor drawn "Roving" Batteries.