 In 1921, following the conclusion of the demobilisation process, Australia's part-time military force, the Citizens Force, was reorganised to perpetuate the numerical designations of the AIF.As a result, the 13th Brigade was re-raised as part of the 5th Military District, headquartered in Perth, Western Australia, and consisted of the 11th, 16th, 28th, and 44th Infantry Battalions.As a mixed brigade, it also included a single light horse regiment