The world in 371 AD — what happened that year

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

What happened

Huan Wen took Shouyang and beheaded Yuan Jin. (Book of Jin (Jinshu), Imperial Annals 晉書卷008 帝紀太和6年1月)
Huan Wen, citing an order from the Empress Dowager Chongde, deposed the Duke of Haixi. (Book of Jin (Jinshu), Imperial Annals 晉書卷008 帝紀太和6年11月)
Emperor Jianwen ascended the throne, and Huan Wen stationed himself in the Central Hall. (Book of Jin (Jinshu), Imperial Annals 晉書卷009 帝紀咸安1年11月)
Zuan, in fear, bound himself and came out to surrender; Ya escorted Zuan to Chang'an. (Zizhi Tongjian (Comprehensive Mirror) 卷103 371년 단락7 제5문)

The king of Baekje attacked Pyongyang fortress with thirty thousand men; the king met them but was struck by an arrow and died on the twenty-third day of that month. (Samguk Sagi (History of the Three Kingdoms) 卷18 故國原王 41年) tradition
The king and the crown prince attacked Goguryeo's Pyongyang fortress with thirty thousand elite troops; Goguryeo king Sayu fought hard, was struck by an arrow and died, and they withdrew. (Samguk Sagi (History of the Three Kingdoms) 卷24 近肖古王 26年) tradition
Baekje moved its capital to Hansan. (Samguk Sagi (History of the Three Kingdoms) 卷24 近肖古王 26年) tradition
King Geunchogo took Goguryeo's Nam Pyongyang and moved the capital to Bukhansung (today's Yangju). (Samguk Yusa (Memorabilia of the Three Kingdoms) 紀異第二南扶餘前百濟) tradition

Martin begins preaching in Gaul and converts pagans to Christianity (the year of his appointment as bishop of Tours, 371, is used as the reference date). (Gregory of Tours, History of the Franks Hist. Franc. 1.XXXVI)

Places where the world territory data shows a change of borders in this year.

◆ Former Yan ends
◆ Kingdom of Armenia (antiquity) ends
◆ Former Qin takes 772,900 km² of former Former Yan land
◆ Sasanian Empire takes 218,400 km² of former Kingdom of Armenia (antiquity) land
◆ Former Yan loses 772,900 km² to Former Qin
◆ Kingdom of Armenia (antiquity) loses 218,400 km² to Sasanian Empire