Whakaotihia te rerenga e whai ake nei: I mahi a Dvorak ki te American Army Field Artillery
i te wā o te haerenga whiu ki a Pancho Villa, ā, i whara ia i te wā o te pakanga. I muri i tera ka tukuna ia ka uru ki te United States Naval Reserve, ka whakaako i te pāngarau me te whakatere tae noa ki te Pakanga Tuatahi o te Ao, i te wa i mahi ai ia i runga i te kaipuke Tiamana i hopukina a USS "Callao" e kawe ana i nga hoia ki te kaainga tae noa ki tana tangohanga i te 1919. I muri mai, ko ia te rangatira o te "Gato" -class submarine i roto i te United States Navy i te Pakanga Tuarua o te Ao. I te wa e kiia ana tona ingoa ), me te "ř" he rite tonu ki te toru o te wa kotahi, na te mea he uri Czech ia, ko te whanau o Dvorak i te US e kiia ana ko, me te "r" Ingarihi.