In 1921, Australia's part-time military force, the Citizens Force (later known as the Militia), was re-organised to perpetuate the numerical designations and structure of the AIF. At this time the 20th Battalion was re-raised in New South Wales, around Parramatta, and was again placed under the command of the 5th Brigade, 2nd Division. Upon formation, the new 20th Battalion drew personnel from the 20th Infantry Regiment, and through this link it inherited two battle honours: "Suakin 1885" and "South Africa 1899–1902". Territorial designations were introduced in 1927, at which point the battalion adopted the title of the "Paramatta and Blue Mountains Regiment"; at the same time the motto of "Pro Patria" was approved.