Tuhia he tomokanga mō tēnei whitiāhua - He mea pouri ki a Sibert, i te wā i uru atu ai te Hononga o Amerika ki te Pakanga Tuatahi o te Ao i te Paenga-whāwhā o te tau 1917, ko te Pirihimana Sibert tētahi o ngā rangatira hōia anake o te ope hiko i te mahi. I tika ia ki te rangatira nui me te whakatinana me nga roopu tuatahi e wha o te American Expeditionary Force (AEF) i hanga i te 1st Infantry Division (i tapaina ko "The Big Red One") i France. Ko te kaihauturu o te AEF, ko John Joseph Pershing, he kaitohutohu hiko roa e rongonui ana mo ana mahi i San Juan Hill
i te Pakanga Paniora-Amerika, a, i te wa tata nei i te kawenga mo te pakanga ki a Pancho Villa, he iti noa nga rangatira rangatira (i whakawhiwhia ia ki tana tūranga) na Sibert i whakanohoia hei rangatira mo te 1st Infantry Division.