Whakaotihia te rerenga e whai ake nei: I wehe atu te 15th Infantry i Haina ki Fort Lewis, Washington, i te 2 o Poutu-te-rangi 1938. I te 12 o Hanuere 1940, i whakawhiwhia te puhi ki te 3rd Infantry Division. I mahi a LTC Dwight D. Eisenhower i te 15th mai i te Maehe ki te Noema 1940, hei rangatira o te 1st Battalion. I te 24 o Oketopa 1942, i rere te 15th Infantry me te 3rd Infantry Division mai i Norfolk, Virginia, e haere ana ki French Morocco. Mo nga marama 31 e whai ake nei, i whawhai te ope ki te French North Africa, Sicily, Itari, France, me Tiamana. I te 10 o Hōngongoi ka tīmata te 15 o ngā Pūhoe ki Sicily i Licata i te h.2.57,
Ko te whakaekenga a nga Tauiwi o Hiti, i huaina Operation Husky, i nga takutai o Mollarella me Poliscia. I te mutunga o te pakanga i Uropi, e 16 nga kaiwhiwhi Medal of Honor o te 15th Infantry tae atu ki a Audie Murphy, te hoia whawhai tino whakapaipai o te Pakanga Tuarua o te Ao. Ko nga mate o te 15th infantry mo te Pakanga Tuarua o te Ao, 1,633 i mate, 5,812 i whara, me te 419 i ngaro i te pakanga.