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Training Command
Training Marines, Developing Leaders
JTF-SB Marines conduct barrier reinforcement
U.S. Marines with 1st Combat Engineer Battalion, 1st Marine Division, assigned to Joint Task Force-Southern Border, secure concertina wire before placing it on the ground during border barrier reinforcement operations in Yuma, Ariz., Feb. 23, 2026. U.S. Northern Command is working side-by-side with the Department of Homeland Security and the U.S. Customs and Border Protection within narrowly defined authorities to provide unique military capabilities to protect the territorial integrity of the U.S. southern border. (Dept. of War video by U.S. Marine Corps Lance Cpl. Ruby Centeno)
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