Rubuta ci gaba don wannan sakin layi - Bayan shigar Amurka cikin Yaƙin Duniya na II, O'Neil ya shiga cikin tsaron tsibirin a kan yiwuwar harin Japan, wanda ya faru tsakanin Yuni 4<unk>7, 1942. Domin rawar da ya taka a yakin Midway
, O'Neil an yi masa ado da lambar yabo ta Bronze Star tare da Combat "V". An kuma daukaka shi zuwa matsayin dan lokaci na Lieutenant Colonel a ranar 7 ga Agusta, 1942.