Nyora kupfuurira kweiyi ndima - Korchagin akazvipira kuImperial Russian Army munguva yeHondo Yenyika I, panguva iyo akakuvadzwa kakawanda uye akarumbidzwa. Akasimuka kubva pakuva musoja kuenda pakuva mukuru wechiduku ndokujoina Red Army munguva yeHondo yeVanhu muRussia. Mushure mekushandira neInternational Troops mune yekupedzisira, Korchagin akaiswa muSoviet Central Asia muma1920, achishanda munzvimbo dzakasiyana siyana dzehutungamiriri nevashandi. Pakati pema1930 akava mutungamiri weboka rakashandiswa michina asati asungwa munguva yeGreat Purge. Korchagin akasunungurwa muna 1940 ndokudzorerwa muRed Army, achiraira 17th Tank Division pakatanga Operation Barbarossa. Korchagin akatungamira chikamu muHondo yeSmolensk uye akaramba ari mukutungamira mushure mekugadziriswazve kuita brigade nekuda kwekurasikirwa kukuru. Mushure mekunge brigade yake yaparadzwa muHondo yeMoscow, Korchagin akava mutariri wezvikamu zveaerosani asati atungamira 17th uye 18th Tank Corps muHondo yeVoronezh
. Akava mutungamiri we2nd Mechanized Corps, iyo yakazova 7th Guards Mechanized Corps, muna September 1942, achitungamirira iyo kwehondo yose. Akaitwa Gamba reSoviet Union nokuda kwokutungamirira kwake boka racho munguva yeHondo yeDnieper, Korchagin akabata basa reuto rehondo mushure mehondo.