7 events the sources record for this year, grouped by region.
What happened
China (2)
When the King of Goryeo, Wang Zhi, submitted a letter of apology, he was granted the land of several hundred li east of the Yalu River. (History of Liao (Liaoshi) 遼史 卷13 統和11年 1月)
King Seongjong visits Seogyeong and advances as far as Anbuk-bu, but on news that the Khitan Xiao Sunning had broken Bongsan district, he cannot go further and turns back. (Goryeosa (History of Goryeo) 世家 卷3 成宗 十二年)
October 993: Bak Yang-yu, Seo Hui and Choe Ryang are sent to the northern frontier as upper, middle and lower army commanders; as Seongjong reaches Anbuk via Seogyeong, he hears that the Khitan Xiao Sunning attacked Bongsan and captured vanguard Yun Seo-an and others (Goryeosa Jeolyo (Essentials of Goryeo History) 권2 成宗文懿大王 十二年)
Western Europe (3)
Olaf came to Staines with 93 ships, plundered it, and went on to Sandwich. (Anglo-Saxon Chronicle Giles/Ingram 1847 A.D. 993 항 (pg657.txt 줄 4461))
Olaf moved from Staines to Sandwich. (Anglo-Saxon Chronicle Giles/Ingram 1847 A.D. 993 항 (pg657.txt 줄 4461))
Olaf's army passed through Ipswich, killed Ealdorman Byrhtnoth at Maldon and won the battle; afterwards there was peace. (Anglo-Saxon Chronicle Giles/Ingram 1847 A.D. 993 항 (pg657.txt 줄 4461))