The Fourth Dimension of Warfare: An Interview With an OSS Veteran John Singlaub served as a covert operative in Europe and the Pacific. Below is Bob Bergin's interview with Singlaub, first published in 2008. Here's What You Need to Know: Major General John K. Singlaub was a young airborne lieutenant when he took up an offer from the Office of Strategic Services (OSS) to become engaged in “hazardous duty behind enemy lines.” He was a participant in Operation Jedburgh and parachuted into occupied France to organize, train, and lead a French Resistance unit. When the Germans were driven from his operational area, he was concerned that he might miss the rest of the war and volunteered for duty in the Far East. He was sent to China, where he trained a guerrilla unit to operate in Japanese-occupied Indochina and just before the Japanese surrender led a dangerous mission to rescue allied POWs on Hainan Island off the Chinese coast. The operations carried out by General Singlaub and other OSS Special Operations officers during World War II were the foundation upon which the U.S. Special Forces were built and the basis for the special operations that are conducted by U.S. forces to this day.