The world in 671 AD — what happened that year

9 events the sources record for this year, grouped by region.

What happened

In the tenth month of year 10, the crown prince met the emperor and asked to practice the Buddhist way at Yoshino; the emperor permitted it, and the crown prince entered Yoshino. (Nihon Shoki (Chronicles of Japan) 日本書紀卷第廿七天智紀 10年 단락199)
Gao Kan of Tang defeated the Goguryeo refugees at Ansi fortress. (Samguk Sagi (History of the Three Kingdoms) 卷22 寶藏王下 2年)
In July 671 (Yiwei day), Gao Kan defeats the remnants of Goguryeo at Anshi city. (Zizhi Tongjian (Comprehensive Mirror) 권202 671년 항)

Silla attacked Baekje and fought south of Ungjin. (Samguk Sagi (History of the Three Kingdoms) 卷07 文武王 11年)
Jukji and others trampled the rice of Garim fortress of Baekje and fought the Tang army at Seokseong, killing more than five thousand. (Samguk Sagi (History of the Three Kingdoms) 卷07 文武王 11年)
Sobuli-ju was established and Achan Jinwang was made its governor. (Samguk Sagi (History of the Three Kingdoms) 卷07 文武王 11年)
Tang general Gao Kan and others arrived at Pyongyang with forty thousand auxiliary troops. (Samguk Sagi (History of the Three Kingdoms) 卷07 文武王 11年)
When the Tang army was said to be coming, Myeongnang built Sacheonwangsa of colored silk, made images of the five-directional guardians and performed secret rites; wind and waves rose and all the Tang ships sank. (Samguk Yusa (Memorabilia of the Three Kingdoms) 紀異第二文虎王法敏)

In the fourth month of year 10, a tower was set up at Shindai and the hour was first announced by bell and drum. (Nihon Shoki (Chronicles of Japan) 日本書紀卷第廿七天智紀 10年 단락182)