The 9th Division was formed on 1 October 1978 as a reserve division to manage and train reservist units before it became a combined arms division on 31 March 1992.[3][4] On 1 January 1995, the 9th Division was restructured to include both active and reservist personnel. On 17 August 2004, the 9th Division and HQ Infantry merged to form HQ 9th Singapore Division/Infantry.[2]