The 5th Battalion, Royal Australian Regiment (5 RAR) is a regular infantry battalion of the Australian Army. Originally established in 1965 it would serve two tours of South Vietnam before it was linked with the 7th Battalion to form the 5th/7th Battalion, Royal Australian Regiment in 1973. In late 2006 the two units were de-linked, and 5 RAR again joined the Australian Army's order of battle in its own right. It has since served in Iraq, East Timor and Afghanistan.