I muri mai, ka riro i a Roper te mana o te USS Wisconsin (BB-64) mo nga marama whakamutunga o te Pakanga Tuarua o te Ao, ka whai i a Earl E. Stone. I taua wā, i ārahi ia i a Wisconsin i te Pakanga o Okinawa. Mo tana mahi i te pakanga, i whakawhiwhia ia ki te Legion of Merit. I mua, i whakawhiwhia ki a ia he Letter of Commendation mo ana ratonga i te Rohe o te Moananui a Kiwa ki te Tonga, i taua wa i awhina ia ki te whakamahere i te Guadalcanal me nga Moutere o Solomon
Ngā pakanga.