3d Battalion 12th Marines

U.S. Marines with 3d Battalion, 12th Marines, 3d Marine Division, in conjunction with the U.S. Air Force 353d Special Operations Group, execute a High-Mobility Artillery Rocket System Rapid Insertion event within the first island chain in response to destabilizing actions which threaten the rules-based international order. The Marines are part of a joint force able to communicate and operate across all domains when called upon. III MEF executed this as part of a no-notice, integrated, rapid response event across the expanse of the first island chain to demonstrate U.S. resolve to maintaining regional security and stability. (U.S. Marine Corps photo by LCpl Diana Jimenez) Click here to see more photos

U.S. Marines with 3d Battalion, 12th Marines, 3d Marine Division, in conjunction with the U.S. Air Force 353d Special Operations Group, execute a High-Mobility Artillery Rocket System Rapid Insertion event within the first island chain in response to destabilizing actions which threaten the rules-based international order. The Marines are part of a joint force able to communicate and operate across all domains when called upon. III MEF executed this as part of a no-notice, integrated, rapid response event across the expanse of the first island chain to demonstrate U.S. resolve to maintaining regional security and stability. (U.S. Marine Corps photo by SSgt Albert Carls) Click here to see more photos

U.S. Marines with 12th Marines, 3d Marine Division, participate in a change of command ceremony on Camp Hansen, Okinawa, Japan, May 26, 2021. The ceremony represented the transfer of responsibility, authority, and accountability from Col. Michael J. Roach, the outgoing commanding officer of 12th Marines, to Col. Nick Sims, the incoming commanding officer of 12th Marines. (U.S. Marine Corps video by Lance Cpl. Kelly A. Snyder)

U.S. Marines with 3d Battalion, 12th Marine Regiment, 3d Marine Division, fire a M777A2 Howitzer during Artillery Relocation Training Program 21.1 at Combined Arms Training Center, Camp Fuji, Japan, April 28, 2021. The training contributes to the defense of Japan and the U.S.-Japan Alliance as the cornerstone of peace and security in the Indo-Pacific region. ARTP provides realistic, live-fire training opportunities to the only permanently forward-deployed artillery unit in the Marine Corps, enabling them to provide precision indirect fires from a distributed environment in support of maritime operations (U.S. Marine Corps photo by Cpl. Michael Jefferson Estillomo) Click here to see more photos

U.S. Marines with 3d Battalion, 12th Marines, 3d Marine Division, conduct a High Mobility Artillery Rocket System notional fire mission during Artillery Relocation Training Program 21.1 at Combined Arms Training Center, Camp Fuji, Japan, April 22, 2021. The training contributes to the defense of Japan and the U.S.-Japan Alliance as the cornerstone of peace and security in the Indo-Pacific region. ARTP provides realistic, live-fire training opportunities to the only permanently forward-deployed artillery unit in the Marine Corps, enabling them to provide precision indirect fires from a distributed environment in support of maritime operations (U.S. Marine Corps photo by Cpl. Michael Jefferson Estillomo) Click here to see more photos

3d Battalion 12th Marines Leaders

Commanding Officer

Lieutenant Colonel Roe S. Lemons Jr

Lieutenant Colonel Lemons graduated from the University of Houston with a BS in Kinesiology-Exercise Science. After graduating from The Basic School, 2nd Lt Lemons completed the Field Artillery Officer Basic Course at Fort Sill, Oklahoma.In April 2004, 2nd Lt Lemons reported to Battery B, 1st...

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Official Photo

Sergeant Major

Sergeant Major Brian A. Woodruff

Sergeant Major Woodruff enlisted in the Marine Corps 16 November 2000, and attended recruit training at MCRD San Diego, CA graduating in October 2001. Upon graduation of recruit training, he was directed to Marine Combat Training, School of Infantry - West in December 2001. Following MCT he reported...

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Official Photo

3d Battalion
12th Marine Regiment
Unit 36110
FPO, AP 96385-6110

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S1 (Admin)

S-1 Adjutant

DSN: 315-623-7764

S-1 Chief
DSN: 315-623-7765

S2 (Intel)

S-2 Intel Officer

DSN: 315-623-4058

S-2 Chief
DSN: 315-623-4777

S3 (Ops)

Operations Officer

DSN: 315-623-7763

S3A
DSN: 315-623-1157

S3 Chief
DSN: 315-623-4213

S3 Training
DSN: 315-623-4796

S4 (Log)

S4 Officer

DSN: 315-623-4614

S4A
DSN: 315-623-7723

S4 Chief/Embark
DSN: 315-623-1690

Motor Transport Officer
DSN: 315-623-7188

Supply Officer
DSN: 315-623-4456

Medical Officer
DSN: 315-623-4188

S6 (Comm)

S6 Officer

DSN: 315-623-3456/1733

S6 Chief
DSN: 315-623-4605

Radio Chief
DSN: 315-623-7183

Wire Chief
DSN: 315-623-4294

Data Chief
DSN: 315-623-4294

EM Chief
DSN: 315-623-4284