吐蕃
(
764年～
815年)
赤德松赞，是吐蕃的40代赞普（798年－815年在位），赤松德赞的幼子。798年，其兄牟如赞普即位后，吐蕃发生内乱，贵族不久那囊氏将牟如赞普废黜，流放到今不丹地区后，牟如赞普被杀。
赤德松赞在佛教僧人的保护下免于灾难，所以继位后大力发展佛教。
这时唐朝和吐蕃在盐州、灵州、维州、雅州等地仍有冲突，但是，805年，唐德宗去世，
赤德松赞派人献金、银、牛、马吊唁。
根据雅库比的记载，吐蕃军队向西进攻大食，包围了中亚河中地区的撒马尔罕。吐蕃在西域的守将送给哈里发麦蒙一个用金玉雕凿的塑像，被送到麦加的克尔白。
815年，
赤德松赞去世。他有五个儿子，一个出家为僧，两个夭折。剩下的二子，可黎可足崇佛，朗达玛反佛且暴躁。可黎可足遂继承王位。
Red Deshon praise, is 40 on behalf of the Tibetan Tsenpo (798 -815 years in office), Chisongdezan's youngest son. 798, his brother Mutik Tsenpo throne after the civil unrest in Tibet, that bag's elite will soon Mutik Tsenpo deposed, exiled to this region of Bhutan, the MU, such as ZAP killed. Deshon Chan Buddhist monks in red under the protection from disaster, so after following the bit to develop Buddhism.
815, Red Deshon died praise. He had five sons, one became a monk and two died. The remaining two sons, may be sufficient Chong Lai Buddha, Lang Darma anti-Buddhist and irritable. Li may be less then inherit the throne.