Its mission was to be able to quickly deploy anywhere in the world to combat terrorism and deter, detect, and defend from terrorist groups both domestically and internationally.[3] Being paired with this and many other units, like the security force battalion, broadened the range of circumstances that the 4th MEB could respond to.[2] The 4th MEB Marines underwent extensive training to become part of the anti-terrorism team, with urban warfare tactics being prioritized.[2][9] On 26 July 2002, the 4th MEB became the first regular military unit to ever receive the Department of State Group Superior Honor Award for the hard work and dedication of its Marines and sailors during Operation Enduring Freedom.The award recognized Company K, 4th MEB (AT) for outstanding service while stationed at the American Embassy in Kabul, Afghanistan.
Room-to-room house-clearing techniques are a part of the training simulated at Combat Town, Camp Lejeune in 2005.