The 4th/19th Prince of Wales's Light Horse (4/19 PWLH) is a cavalry regiment of the Australian Army. The regiment in its current composition was formed in 1948 when the Citizens Military Force (CMF) was re-raised after the completion of the demoblisation process following the end of the Second World War and it was formed through the amalgamation of three previously existing regiments. Through these predecessor units, 4/19 PWLH can trace its lineage back to the 19th Century and today it is the custodian of the battle honours earned by these units. The regiment had a Regular squadron, 1 Troop 4th/19th Prince of Wales Light Horse Regiment, which was posted to South Vietnam in 1965 where it was attached to 1 RAR operating out of Bien Hoa Province. It returned to Australia on 28 May 1966 and be