On 31 December 1900 the day before Federation, a survey of the strength of colonial forces found that the Tasmanian colonial forces consisted of 113 officers and 1,911 other ranks. Upon Federation, all of the Australian colonial forces came under the control of the Federal Government of Australia. As a result, the Tasmanian Mounted Infantry units were redesignated as the 12th Australian Light Horse Regiment in 1903, while the three battalions of the Tasmanian Volunteer Rifle Regiment were re-designated as part of the Citizens Military Force becoming the Derwent Infantry Regiment (Hobart), the Launceston Regiment (Launceston), and the Tasmanian Rangers (North West).