Whakaotihia te rerenga e whai ake nei: He mea pouri ki a Sibert, i te tomokanga o te United States ki te Pakanga Tuatahi o te Ao i te Paenga-whawha 1917, ko te Brigadier General Sibert tetahi o nga rangatira rangatira o nga hoia 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 kaihautū o te AEF, ko John Joseph Pershing, he rangatira hōia kua roa e mahi ana, e mōhiotia ana mō āna mahi i
Ko 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 iho nga rangatira rangatira (ko ia ano i whakatairanga tata nei ki tana tuunga) na Sibert i whakanohoia hei rangatira mo te 1st Infantry Division.