Air Force. Each year, the tournament brings together more than 400 fighters from more than 50 countries to compete. The Siam Cup BJJ 2021 was scheduled to take place on May 8, but due to restrictions imposed for COVID-19 during the coronavirus pandemic, the Thai government temporarily postponed all sporting events. See also Royal Thai Air Force Museum Royal Thai Armed Forces Headquarters Military of Thailand Royal Thai Army Royal Thai Navy Royal Thai Police Napa-1 References Notes Comments Bibliography Wieliczko, Leszek A. and Zygmunt Szeremeta. Nakajima Ki 27 Nate (bilingual Polish/English). Lublin, Poland: Kagero, 2004. . External links RTAF Official website (English version) Royal Thai Air Force Whitebook on Gripen program (Thai) Royal Thai Air Force Press Release on Gripen program (Eng) Royal Thai Air Force VDO on Gripen program (Thai) Royal Thai Air Force Museum Many Historical Aircraft Here (English Page available) Reports with drawings and pictures about the Royal Thai Air Force Globalsecurity.org Early history of the Airports of Thailand Authority Japanese Aircraft In Royal Thai Air Force and Royal Thai Navy Service During WWII at j-aircraft.com Military units and formations established in 1913 1913 establishments in Siam Air forces by country Military of Thailand