The identifier in connection with 2RAR (2nd Battalion, Royal Australian Regiment) appears to refer to the service number of a specific soldier.
: 2RAR was originally established as the 66th Battalion in 1945 for occupation duties in Japan before being renamed in 1948. 21883 rar
: Deployed twice between 1955 and 1963.
: Completed two tours of duty (1967–1968 and 1970–1971). The identifier in connection with 2RAR (2nd Battalion,
: The battalion has a storied history of service, including deployments in: The Korean War : Served from 1953–1954. 21883 rar