Lance Cpl. Alexander Sieck, a Greenville, Calif., and data network specialist with Combat Logistics Battalion 11, 1st Marine Logistics Group, remains vigilant on a patrol during the certification portion of the Basic Combat Skills Course aboard Marine Corps Base Camp Pendleton, Calif., Nov. 20, 2015. BCSC serves as a refamiliarization course for non-infantry Marines, teaching the fundamental skills needed to operate in a deployed environment. ( Marine Corps photo by Lance Cpl. Devan K. Gowans/Released)

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Keywords: 1st, basic, combat, dead, groups, land, logistics, marine, mout, navigation, patrolling, reckoning, room-clearing, school, searching, skills, training