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August 18, 2025
By Marine Corps 1st Lt. John Carter

Task Force Forge Marines and Sailors Assume Southern Border Mission in Arizona

Service members assigned to Combat Logistics Battalion 15, 1st Marine Logistics Group, I Marine Expeditionary Force, known as Task Force Forge, assumed operational responsibilities last month from 1st Combat Engineer Battalion, 1st Marine Division, known as Task Force Sapper, to support U.S. Northern Command's ongoing assistance to the Department of Homeland Security under Joint Task Force Southern Border.

Comprised of 500 Marines and sailors, Task Force Forge is conducting vital ground engineering and logistical operations within the U.S. Border Patrol's Yuma Sector located in Arizona. These missions include reinforcing the existing southern border barrier, emplacing national defense area signage and performing roadway surveys and maintenance — all part of the Defense Department's continued support to U.S. Customs and Border Protection.

Before starting barrier reinforcement tasks, the unit completed a series of barrier surveys along key segments to evaluate conditions, identify reinforcement needs and guide mission planning. These assessments form the foundation for ongoing operations.

The barrier reinforcement mission, previously conducted by Task Force Sapper in the San Diego Sector, was an anticipated requirement that Task Force Forge had prepared for in advance. Marines and sailors are now welding prefabricated steel brackets onto the existing barrier infrastructure. Once installed in sufficient numbers, these brackets will support the placement of barbed and concertina wire, enhancing the overall security of the barrier.

"The Marines and sailors of Task Force Forge bring precision, professionalism and purpose to every mission," said Marine Lt. Col. Colin Graham, CLB 15 battalion commander and Task Force Forge commanding officer. "Reinforcing the border barrier is a tangible way we assist our interagency partners to strengthen security and protect the territorial integrity of the United States."

In parallel, following the recent establishment of the Yuma National Defense Area — located adjacent to the Barry M. Goldwater Range and now part of Marine Corps Air Station Yuma — Task Force Forge has been tasked with emplacing NDA signage throughout the NDA 4 East region. This land, previously owned by the Interior Department, was transferred to the Navy, with Marine Corps Air Station Yuma delegating operational authority to Northcom.

Additionally, the task force is conducting detailed surveys of unimproved roads essential for maintaining mobility for CBP and DOD personnel operating in rugged desert terrain. These surveys evaluate road geometry, surface conditions and drainage patterns.

Task Force Forge engineering experts are using these findings to plan targeted maintenance activities such as blading, reshaping and dust abatement. These efforts aim to preserve the environmental integrity of each route while ensuring safe and reliable travel for mission-critical operations.