Buuxi weedha soo socota: 2 CER's lineage waxaa si rasmi ah loogu raad raacaa 4th Field Company (4 Fd Coy) Royal Australian Engineers, oo la soo saaray marxaladihii hore ee Dagaalkii Koowaad ee Adduunka. Waxaa loo beddelay 7th Field Company (7 Fd Coy) sanadkii 1915, cutubku wuxuu caan ku ahaa adeegiisii Faransiiska iyo Belgium-ka ee Dagaalkii Somme, Menin Road iyo Khadka Hindenburg. Dagaalkii Labaad ee Adduunka, 7 Fd Coy waxay kula dagaalameen Japan
Kokoda iyo Bougainville.