Lauri Allan Törni (28 May 1919 – 18 October 1965), later known as Larry Alan Thorne, was a Finnish-born soldier who fought under three flags: as a Finnish Army officer in the Winter War and the Continuation War ultimately gaining a rank of captain; as a Waffen-SS captain (under the alias Larry Laine) of the Finnish Volunteer Battalion of the Waffen-SS when he fought the Red Army on the Eastern Front in World War II; and as a United States Army Major (under the alias "Larry Thorne") when he served in the U.S. Army Special Forces in the Vietnam War.
Törni died in a helicopter crash that occurred on October 18, 1965, during a covert mission in Laos amidst the Vietnam War. Serving with the U.S. Army Special Forces, Törni was involved in operations conducted by MACV-SOG when the helicopter he was on crashed under unclear circumstances. The crash site was difficult to locate due to the rugged terrain and adverse weather conditions, delaying recovery efforts. Törni's remains, along with those of other soldiers aboard, were eventually found three decades later.