Marines from Combat Logistics Battalion-15 practice securing a Humvee to a rail car while aboard Marine Corps Logistics Base Barstow, Calif. on Aug 15. The Marines learned how to load, tie down, and prepare vehicles for transportation via rail in order to expand their logistical skill set. - Marines from Combat Logistics Battalion-15 practice securing a Humvee to a rail car while aboard Marine Corps Logistics Base Barstow, Calif. on Aug 15. The Marines learned how to load, tie down, and prepare vehicles for transportation via rail in order to expand their logistical skill set.