5 events the sources record for this year, grouped by region.
What happened
China (3)
In the third year, Ogōri is torn down to build a palace, and there the rites are established (Nihon Shoki (Chronicles of Japan) 日本書紀 卷第廿五 孝徳紀 3年 단락61)
Tang generals Niu Jinda and Li Haian entered Goguryeo, fought more than a hundred battles, took Seokseong fortress and reached below Jeokri fortress. (Samguk Sagi (History of the Three Kingdoms) 卷22 寶藏王下 6年)
In May 647, Li Shiji crosses the Liao River and passes Namso and other cities; Goguryeo fights outside the walls but is routed; he burns the outer defenses and returns. (Zizhi Tongjian (Comprehensive Mirror) 권198 647년 항)