The 1st Battalion, Royal Australian Regiment (1RAR) is a light infantry battalion formed in 1945. MacGregor's service with the unit during the Vietnam War (1965–1966) marked one of its most pivotal operational periods, including significant actions at Fire Support Base Coral and in .
: A self-published account later expanded with historical archives. Sandy 1rar
: A more recent collaborative work detailing how the Australian Tunnel Rats fought the Viet Cong. 1RAR Context The 1st Battalion, Royal Australian Regiment (1RAR) is
: He documented these experiences in several books, including: : A more recent collaborative work detailing how
: In January 1966, while attached to 1RAR, Sandy MacGregor’s troop became the first Allied unit to enter the secret Viet Cong tunnel systems . These soldiers, known as "Tunnel Rats," crawled into dark, booby-trapped tunnels with only a flashlight and a pistol to gather intelligence and destroy enemy infrastructure.
: MacGregor was awarded the Military Cross for his bravery and leadership in South Vietnam.