Amin akabatana neKing's African Rifles (KAR) yeBritish Colonial Army muna 1946 semubatsiri wekubika. Zvisinei, mumakore ake akazotevera, akareva nhema kuti akashanda muBurma Campaign yeHondo Yenyika II. Akaendeswa kuKenya kunoshanda muuto revarwi sevarwi muna 1947, uye akashanda mu21st KAR infantry battalion muGilgil, Kenya Colony kusvika muna 1949. Gore iroro, chikwata chake chakatumirwa kuchamhembe kweKenya kunorwisa vapanduki veSomalia muhondo yeShifta. Muna 1952, brigade rake rakagadzirirwa kurwisa vapanduki veMau Mau muKenya. Akakwidziridzwa kuva corporal gore rimwe chetero, ndokuzoitwa sergeant muna 1953. Muna 1959, Amin akasimudzirwa kuva afande, chinzvimbo chepamusoro chinogoneka kumunhu mutema weAfrica muBritish Colonial Army yenguva iyoyo.
Gore ra1962