Rubuta ci gaba don wannan sakin layi - Daga nan sai aka sake tura Riley zuwa Noumea, New Caledonia kuma an ba shi mukamin Laftanar Kanal a watan Agustan 1943. An canja shi zuwa ma'aikatan III Marine Amphibious Corps a watan Oktoba na wannan shekarar kuma ya yi aiki a matsayin mataimakin injiniya da kuma jami'in zartarwa na Sashen Injiniya a lokacin yakin da aka yi a Bougainville, Emirau
, Saipan da kuma Guam.