Ku sii qor faqradan - Intii lagu jiray Dagaalkii Labaad ee Adduunka, Guutada 40aad, oo leh awood awood u dhexeysa 800 iyo 900, ayaa loo hawlgeliyay adeegga waqtiga buuxa ee 1943, laakiin looma dirin dibedda si ay ula dagaallamaan sababo la xiriira qodobbada "Sharciga Difaaca". Si kastaba ha noqotee, amarkii Kornayl Kornayl Thomas Bartley, waxay ku sii jirtay amarkii dagaalka, iyada oo qayb ka ah Guutada 12aad, oo si kala duwan loogu qoondeeyay Qaybaha 4aad iyo 12aad, waxayna qabatay waajibaadka difaaca ilaa 2dii Maajo 1945 markii ay ku biireen Guutada 12aad si ay u noqdaan Guutada 12aad/40aad, oo markii dambe la kala diray 29kii Maajo 1946. Sanadkii 1953, Guutada 40aad ayaa dib loo habeeyay, iyadoo la qaatay "Invercargill" oo ah socodkeeda guutada, laakiin 1960 waxaa lagu soo daray Royal Tasmania Regiment, iyadoo la sameeyay 'B' Company oo ka tirsan Guutada 1aad ee Pentropically, Royal Tasmania Regiment. Sanadkii 1961, guutada waxaa lagu aaminay sharafta dagaalka ee la siiyay guutada 2aad ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia ee ciidamada Australia.
Dagaalkii Labaad ee Adduunka Guutada waxaa dib loo soo celiyey guutada 40aad, Royal Tasmania Regiment, sanadkii 1972, laakiin saddex sano ka dib waxaa loo yareeyay shirkad madaxbannaan. Waxaa mar kale lagu daray 12aad, oo lafteeda ah shirkad qoryo oo madaxbannaan, 1987 si loo abuuro Guutada 12aad/40aad, Royal Tasmania Regiment, guuto ka tirsan Kaydka Ciidanka Australia.