FORT IRWIN, Calif. – Marines from E Company, 2nd Battalion, 4th Infantry Regiment, 1st Marine Division, Camp Pendleton, Calif., serving as guest Blackhorse Troopers, engage elements of the 1st Stryker Brigade Combat Team, 4th Infantry Division, from Fort Carson, Colo., during their assault through the Alpine Pass, National Training Center, June 30, 2017. This phase of NTC Rotation challenged the Raider Brigade’s ability to conduct a deliberate defense against a near-peer opponent.

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Keywords: 11acr, air, america, archive, armed, army, defence, force, forces, fort, irwin, military, navy, ntc, opfor, reportage, service, serviceman, servicemen, soldier, states, united, usa, usmc