. "18th" . "1919" . . "Purple over green" . . . "18th Battalion" . . "18th Battalion A.I.F." . . . . . . . . "1944" . "Australian 18th Battalion" . . . "18th Battalion (Australia)" . "1915" . "18th Battalion, AIF" . . . "100px" . . . "18th Battalion (Australia)" . "18th Australian Infantry Battalion" . "~800\u20131,000 menref|During World War I, the authorised strength of an Australian infantry battalion was 1,023 men. By the start of World War II, it was 910 men all ranks, however, later in the war it fell to 803.|group=Note" . . . .