6 events the sources record for this year, grouped by region.
What happened
China (2)
Chancellor of the Left Hu Weiyong was executed for treason; the Central Secretariat was abolished and the post of chancellor eliminated. (History of Ming (Mingshi), Annals 明史 卷2 洪武十三年)
1380: 500 Japanese ships enter the mouth of Jinpo, tie their ships together with thick ropes, land and plunder. Na Se, Sim Deok-bu and Choe Mu-seon burn the enemy ships with the cannon made by Choe Mu-seon (Goryeosa Jeolyo (Essentials of Goryeo History) 권31 辛禑 6年)
1380: Yi Seong-gye reaches Namwon and Bae Geuk-ryeom meets him. Without making camp, he crosses Unbong and climbs Jeongsanbong northwest of Hwangsan to survey the dangerous pass; the enemy soon bursts out and he confronts them (Battle of Hwangsan) (Goryeosa Jeolyo (Essentials of Goryeo History) 권31 辛禑 6年)
Eastern Europe & Russia (2)
The grand prince, as a hero finishing the victory, had the trumpet sound the charge under a black banner over the bodies (after the Kulikovo field). (Karamzin, History of the Russian State 제5권 I장)
Novgorod begs Archbishop Alexios to go to Grand Prince Dmitri. (Novgorod First Chronicle litopys 기사 1380년)