1st Battalion, 7th Marine Regiment's color guard posts during the unit's change of command ceremony aboard the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., June 4, 2018. The change of command ceremony ensures that the unit and its Marines are never without official leadership, and also signifies an allegiance of Marines to their unit's commander. (U.S. Marine Corps photo by Lance Cpl. Rachel K. Porter)
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