Anti-Terrorism Battalion

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Anti-Terrorism Battalion
ATBattalion.jpg
AT Bn insignia
Active 2004-2007(USMC) 2007-2013 (USMCR)
Country United States
Branch United States Marine Corps
Type Specialty
Role Anti-terrorism
Size 700+ Marines, 30–40 Navy Hospital Corpsmen
Garrison/HQ Marine Corps Base Camp Lejeune
Nickname(s) AT BN
Motto Vigilia Aeternus (Eternal Vigilance)
Engagements Iraq War

Global War on Terror

Anti-Terrorism Battalion (AT BN) is a disbanded unit of the United States Marine Corps. It was a specially equipped and trained infantry battalion that adapted to meet short notice requirements during Operation Iraqi Freedom for the Marine Corps.

Mission

In premise the mission of the Anti-Terrorism Battalion was to rapidly deploy specially trained and sustainable forces to detect, deter, and defend against terrorism, as well as to conduct crisis response in the event of a terrorist attack.

In reality, the battalion acted as a "fire brigade" filling whatever missions suddenly developed that couldn't be filled by other traditional units without compromising their fighting strength.

Rotational Duty

After the September 11, 2001, the Marine Corps began rotating standard infantry battalions such as 3rd Battalion 8th Marines (3/8) through 6 month assignments as the designated "Anti Terrorism Battalion" to meet short term/no-notice mission requirements. Examples included augmenting security at the American Embassy in Kabul, Afghanistan. These rotations required company and smaller size detachments, but removed the entire force of the 1,000 man infantry battalion from the main war fighting effort. This posed a problem for the Marine Corps' as Operations Enduring Freedom (OIF) and Iraqi Freedom (OEF) began to require additional full strength infantry battalions to rotate in and out of theater at a higher rate.

USMC AT BN Activation

The permanent AT Battalion (AT BN) was activated Oct. 29, 2004, under the 4th Marine Expeditionary Brigade (Anti Terrorism) (4th MEB (AT)). The 4th MEB (AT) was deactivated in February 2006, on the same day Marine Corps Forces Special Operations Command stood up, and the AT BN was administratively transferred initially to the II Marine Expeditionary Force (II MEF), and then finally to the 2d Marine Division by March 2006.

The AT BN initially consisted of;

  • Headquarters and Service Company (which included a Counter Intelligence (CI) Human Exploitation Team (HET) permanently assigned to the battalion.)
  • Alpha Company
  • Bravo Company
  • Charlie Company
  • Delta Company
  • Support Company (which acted as a Weapons Company with three CAAT teams and had a permanently attached Combat Engineer Platoon.)

Iraq & Horn of Africa

Between 2004 and 2007, the AT Battalion had served in western Al Anbar, central Baghdad and northern Diyala provinces of Iraq. Deployments included:

  • A detachment of 30+ Marine Officers and SNCO's fulfilled the Border Transition Team's (BTT) mission on the Syrian border for a year over 2005–2006.
  • The Personal Security Detachment (PSD) for the II MEF Commanding General. Rotations were 1 year each in 2005–2006 and 2007–2008 at Camp Fallujah.
  • A Combined Anti-Armor Team (CAAT) platoon (CAAT III) deployed in support of the II MEF Headquarters Group as a motorized heavy machine gun platoon based out of Camp Fallujah October 2005 – March 2006. While there they conducted convoy escort, route clearance, QRF, and other short term/no notice missions.
  • Combined Anti-Armor Team (CAAT) platoons (CAAT I,II) deployed in support of OIF to FOB Spartan (later FOB Grizzly) located adjacent and within Camp Ashraf, Ashraf city, Diyala Province Iraq October 2005 – May 2006 and worked with various U.S. Army units.
  • The PSD for Regimental Combat Teams (RCT) 2 and 6 Commanders. Each team deployed for a year over 2007–2008.
  • Four rotations to the American Embassy in Baghdad (initially company size, later reduced to platoon sized.) A Co, D Co, two separate platoons from B Co rotated on seven-month deployments from 2005 to 2007.
  • Three company size rotations (B Co 2005 (Reinforced by CAAT I, II teams), A Co 2006–2007, and B Co 2007) to Camp Ashraf / Forward Operating Base Grizzly in Diyala Province in support of US Army 16th MP Brigade. A Co 1st Bn 9th Marines (2005–2006) and a Task Force from the Marine Corps National Capital Region (TF NCR 2007–2008) also deployed to Ashraf.
  • The PSD requirement for the Combined Joint Task Force – Horn of Africa (CJTF-HOA) was supported by a squad size element from the ATBN in 2005–2006.

Numerous Marines also augmented other requirements for National Police Training Teams (NPTT), Military Transition Teams (MiTTs), and MEF augmentation requests to other infantry units.

Most Marines in the battalion completed two to three consecutive combat deployments in a single three-year tour of duty with the battalion as part of their initial 4-year enlistment contract.

USMC AT BN Deactivation

On 13 July 2007, the active duty AT BN stood down in name and was reflagged as the 2nd Battalion 9th Marines as part of the increase in the size of the Marine Corps.

USMCR AT BN Activation

In 2007 the Marine Corps Reserve reactivated the AT BN to meet similar mission requirements that the active duty battalion had met.

Yemen

Fox Company AT BN 4th MARDIV augmented the US Embassy security and Anti-Terrorism operations in Sana'a Yemen 2011-2012.

USMCR AT BN Deactivation

On 21 September 2013, the USMCR AT BN was officially deactivated.

See also

References

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