A watan Maris na shekarar 1942, rundunar ta 30 ta dauki matsayi na tsaro a arewacin Sydney ciki har da tsaro na bakin teku don amsawa ga yiwuwar saukowar Japan a Manly, Freshwater Beach, da Curl Curl.
Tabbas, mafi rikitarwa na jumla shine "A watan Maris na 1942, 30th Battalion ya mamaye wuraren karewa a Arewacin Sydney gami da kariyar rairayin bakin teku don amsa yiwuwar saukowar Jafananci a Manly, Freshwater Beach, da Greta, inda ya tattara tare da sauran Brigade na 8 kafin a tura shi zuwa Yammacin Ostiraliya. "