"20th Infantry Battalion" . "Pro Patria" . . "20th Battalions" . "20th Battalion, AIF" . "1919" . . . "20th Battalion" . . . "White over green" . "1943" . "20th Battalion (Australia)" . . . . . "20th Battalion (Australia)" . . "~900 \u2013 1,000 menref|During World War I, the authorised strength of an Australian infantry battalion was 1,023 men. By the start of World War II, the authorised strength of an Australian infantry battalion was 910 men all ranks, however, later in the war it fell to 803.|group=Note" . "20th" . . "100px" . . "1915" . . "16th Battalion" . . . . . . . "20th/19th" . .