 Ramba uchinyora ndima iyi - Mukati mechikamu chokutanga chebasa romuparadzi, Warrego aishanda mumvura dzeAustralia. Pakutanga kweHondo Yenyika I, Warrego yakapiwa simba reAustralia rakapiwa basa rokudzivisa nyika dzeGermany munharaunda yacho, pamwe chete nokuwana nokuparadza German East Asia Squadron. Usiku hwaAugust 11, 1914, Warrego nehanzvadzi yehanzvadzi yakapiwa basa rekupinda muSimpson Harbour paRabaul kuti vawane uye vanyengedze ngarava dzeGermany kupinda muzvombo zvehondo, asi havana kuwana ngarava muchiteshi. Mukupera kwaAugust uye kutanga kwaSeptember, muparadzi akaperekedza Australian Naval uye Military Expeditionary Force kuNew Britain, uye aibatanidzwa mukumhara kwemautopaKabakaul kuti vatore nhepfenyuro yeredhiyo iri pedyo. Kunze kwokumbomira kwenguva pfupi muSydney, Warrego akaramba ari munharaunda yeNew Guinea kusvikira musi wa5 February 1915, paakapiwa basa rokufambisa kumahombekombe okumabvazuva kweAustralia. Muna October, akaenda kuBorneo, uye akafambisa mapurisa munharaunda yacho kusvikira muna August 1916. 