638
638 — China: The Tibetan Empire attacks the city of Songzhou, now modern Songpan, in Sichuan
3 events. The text is the source chronology verbatim; the terms are in Sources & licenses. The grey lines above and below are the surrounding 2 years.
| KoreaThree Kingdoms of Korea 57 BC–660 | ChinaTang dynasty 618–907 | JapanAsuka period 538–710 | United States |
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- No events recorded for this year
| - The Tibetan Empire attacks the city of Songzhou, now modern Songpan, in Sichuan
- Tibetan attack on Songzhou
- Gar Tongtsen Yulsung of the Tibetan Empire arrives in Tang to ask for a princess bride
- 636The Book of Chen, Book of Northern Qi, Book of Zhou, and Book of Sui were compiled.
- 636The Xumi Pagoda was completed.
- 636The fubing system is revised to comprise 634 intrepid garrisons (zhechong fu 折衝府)
- 639Census estimates a total population of 50 million residing within Tang administered territory
- 640Tang campaign against Karakhoja: Tang defeated and annexed Gaochang.
- 640The Protectorate General to Pacify the West was established.
- 640Tang campaign against Karakhoja: Hou Junji conquers Karakhoja and annexes Gaochang (Turpan, Xinjiang); the Protectorate General to Pacify the West is created
- 640Gar Tongtsen Yulsung of the Tibetan Empire arrives in Tang with tribute and successfully requests for a princess bride
| - No events recorded for this year
| covered from 1607 |