service members and civilians attend a presentation at Marine Corps Recruit Depot San Diego, Calif., Aug. 22, presentation was given to inform the audience about the changes the Marine Corps went through during its involvement of World War I. ( Marine Corps photo by Lance Cpl. Erick J. ClarosVillalta)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: command, corps, depot, diego, docent, mairnes, marine, museum, pme, recruit, san, wwi