SACO was in a joint operation in China with the Office of Strategic Services (OSS), the Intelligence Agency of America and the CIA.
He was also in charge of command for the Loyal Patriotic Army (LPA),[6] a large Japanese military force that had occupied China's interior region.
These were units for training guerrillas of China in small arms, sabotage, demolition, radio handling, and combat techniques, aerology, and ship and aircraft recognition.
To a degree, some of the recruits provided by China were not healthy but their willingness and their ability of learning surprised instructors.
[8] Of all missions during war period that was set up by the Americans in China, the policy of Total Immersion was only applied by SACO with the Chinese.
[5] The mission of this group was to advise, train, and scout areas to land for General Claire Chennault's 14th AF and USN fleet and forecast the weather.
The main objective of the mission during the final year of the Second World War was developing and preparing China's coast for allied occupation and penetration.
[6] The trained guerrillas with the help of SACO and Naval Group China had in total destroyed 84 locomotives, at least 200 bridges and 141 ships and river craft.
However, some loyal guerrillas that were SACO-trained who were part of KMT carried on with aggression against the CCP; this happened when there was a civil war between 1946 and 1949.
[9] The Communists took over and after many years, SACO was linked with revolution atrocities and imperial foreign aggression; the US was suspected to have been involved.
He then incorporated these tactics into the camps with the aid of supplies the United States had left after the end of World War II in 1945.
[16][17] Luo Guangbin, Lui Debin, and Yang Yiyan, survivors of Baigongguan and Zhazidong, wrote a novel based on their experiences, which went on to become popular among the Chinese.