Rubuta ci gaba don wannan sakin layi - Da yake yana sha'awar jirgin sama tun yana yaro, Plagis ya ba da kansa ga Sojojin Sama na Kudancin Rhodesian (SRAF) jim kaɗan bayan barkewar yaƙi a watan Satumbar 1939. An ƙi shi saboda shi ɗan ɗan ƙasa ne kuma saboda haka ba ɗan ƙasa ba ne, duk da cewa ya zauna a Rhodesia duk rayuwarsa. Bayan da Italiya ta mamaye
Girka a ƙarshen Oktoba 1940, ya kawo Helenawa cikin yaƙin a gefen Allied, Plagis ya sake neman - wannan lokacin don shiga Royal Air Force, wanda ya sha SRAF a watan Afrilu 1940 - kuma an karɓa. Horar da farko a Kudancin Rhodesia, sa'an nan Ingila, Plagis ya fita tare da matsayi na jirgin sama a watan Yunin 1941 tare da sama da matsakaicin matsakaicin a duk gwajin da ya tashi.