Kammala wannan jumlar: Bayan sanarwar da Biritaniya ta yi wa Jamus a ranar 4 ga Agusta, 1914, Ostiraliya da sauran mambobin Daular Burtaniya suma suna cikin yaƙi. Na farko Australian ya halaka a Western Front shi ne Lieutenant William Malcolm Chisholm na Lancashire Regiment, wanda ya mutu a cikin
Yaƙin Le Cateau a Faransa a ranar 26 ga Agusta 1914. Kusa da gida, sojojin Ostiraliya sun tabbatar da New Guinea na Jamus da Bismarck Archipelago a watan Satumba zuwa Oktoba 1914. 'Yan Australia sun sauka a tsibirin Gallipoli a Turkiyya a ranar 25 ga Afrilu, 1915. A watan Oktoba 1915, Ostiraliya ta rasa mutane 7,279 a cikin Kamfen na Gallipoli kuma dubban mutane sun ji rauni. Kodayake sojojin Ostiraliya sun janye daga Gallipoli a ranar 20 ga Disamba, 1915, ana buƙatar ƙarin sabbin mutane a Gabas ta Tsakiya da Yammacin Yamma.