It was originally raised in 1965 as part of Australia's commitment to the Vietnam War and it eventually served two tours in Vietnam in 1967 and 1971. In 1973, following Australia's withdrawal from the conflict, the battalion was amalgamated with the 5th Battalion, Royal Australian Regiment to form the 5th/7th Battalion, Royal Australian Regiment (5/7 RAR).
These two units remained linked until 2007, during which time they served together in the mechanised infantry role in East Timor and Iraq. In December 2006 – early January 2007, 5/7 RAR was delinked and 7 RAR was re-raised. In January 2009, 7 RAR achieved operational status, a year ahead of schedule.
It is currently part of the 1st Brigade and is based at RAAF Base Edinburgh in Adelaide, South Australia.
The motto of the 7th Battalion Royal Australian Regiment is ‘Duty First’.