Rubuta ci gaba ga wannan sakin layi - Yayin da yake aiki a kamfanin karafa, Warren ya fara halartar makarantar dare a kwalejin ƙarami a Kansas City, sannan ya shiga aikin soja a cikin Tsarin Horar da Sojoji na Musamman. A matsayin mai horar da Sojoji an sanya shi a cikin shirin injiniya mai sauri a Jami'ar Jihar Kansas. Bayan ya yi karatu sosai a can, an karbe shi a cikin shirin horar da sojoji a cikin yaren Jafananci da nazarin yankin da ake gudanarwa a Jami'ar Yale. Ya kammala wannan shirin ba da daɗewa ba bayan ranar haihuwarsa ta 18, bayan da ya shafe kashi huɗu cikin huɗu a Yale. A lokacin rani na shekara ta 1945, yana da shekaru 18, ya fara horo a sansanin Roberts a California. An dakatar da horar da shi na soja bayan da Japan ta mika wuya
ya kawo karshen yakin. Daga nan Sojojin suka tura shi zuwa Jami'ar Minnesota don ci gaba da karatunsa na Japan da yarensa. Bayan watanni uku a Minnesota, an tura shi zuwa Japan, inda ya yi shekara ta ƙarshe na aikin soja na Amurka.