Pedzisa mutsara unotevera: Mushure mokunge apedza kubva kuSandhurst, Bellamy akapiwa basa semutungamiri wechipiri muDuke of Cornwall's Light Infantry musi wa 28 August 1930. Akakwidziridzwa kuva lieutenant musi wa 29 August 1930. Akashanda muHondo yeFrance ne2nd Battalion, DCLI, muna 1940 uye akataura nezvake mumashoko nokuda kwemabasa ake muna December. Akakwidziridzwa kuva lieutenant colonel muna 1943 uye akashanda kuNorthwest Europe muna 1944 na1945, semukuru mukuru (CO) we1st Battalion, Royal Norfolk Regiment, iyo yaakanga akwidziridzwa kuti atungamirire muna Gumiguru 1943. Bellamy akatungamirira battalion panguva yeD-Day landings uye Hondo yeNormandy uye Hondo yeGungwa reNormandy.
Mushandirapamwe wokuchamhembe kwakadziva kumavirira kweEurope.