Kammala jumla mai zuwa: Aikin Yeager ya fara ne a yakin duniya na biyu a matsayin soja a rundunar sojojin Amurka, wanda aka sanya wa rundunar sojan sama a 1941. Bayan ya yi aiki a matsayin injiniyan jirgin sama, a watan Satumbar 1942, ya shiga horar da matukin jirgi kuma bayan kammala karatunsa an ba shi mukamin jami'in jirgin sama (Jaridar Sojan Sama ta Sojan Sama ta Sojan Sama ta Sojan Sama), daga baya ya sami mafi yawan nasarorin da ya samu a matsayin matukin jirgin sama na P-51 Mustang a kan jirgin sama.
Yammacin Yamma, inda aka yaba shi da saukar da jirgin sama na abokan gaba 11.5 (rabin yabo daga matukin jirgi na biyu ne wanda ya taimaka masa a harbi guda). A ranar 12 ga Oktoba, 1944, ya sami matsayin "ace a cikin rana", ya harba jiragen sama biyar na abokan gaba a cikin manufa daya.