Tuhia he haere tonu mo tenei whitianga - Ka hoki a Masters ki Pearl Harbor ki te whakauru ki te 10th Defense Battalion i te marama o Noema 1942. I muri mai, hei rangatira whakahaere mo te puranga, i whakauruhia ki te I Marine Amphibious Corps, i mahi ia i te Solomon
me ngā Moutere o Russell. I whakatairangahia ia ki te rangatira rangatira i te Paenga-whāwhā 1943. I te marama o Akuhata o taua tau, i whakahau ia i te 2nd Battalion 1st Marines i Ahitereiria i mua i te kawe i te waahanga ki te whawhai mai i te Tihema 1943 ki te Hui-tanguru 1944 i te Pakanga o Cape Gloucester, i raro ano i te whakahau a Rupertus, inaianei ko te rangatira rangatira o te 1st Marine Division.