Secret training camps were set up, the majority of set up by the populist politician Tiang Sirikhanth in the northeast of the country. There were a dozen camps alone in Sakhon Nakhon Province. Secret airfields also appeared in the northeast, where Royal Air Force and United States Air Force planes brought in supplies, as well as Special Operations Executive, Office of Strategic Services, and Seri Thai agents; while at the same time evacuating out prisoners of war. By early 1945, Thai air force officers were performing liaision duties with South East Asia Command in Kandy and Calcutta.