13 events the sources record for this year, grouped by region.
What happened
China (6)
Yang Guang, Prince of Jin, marched to Liuhe, Yang Jun, Prince of Qin, to Xiangyang, and Yang Su to Xinzhou; in total 518,000 men (ninety commanders) were sent to conquer Chen. (History of the Northern Dynasties (Beishi), Annals 北史 卷11 開皇8年)
Yang Guang, Prince of Jin of the Sui, sent his forces from Ba, Shu, Mian and Han in dozens of columns down to Guangling on the lower Yangtze; the governor of Xiangzhou, Shi Wenqing, and others suppressed the reports, so no defenses were prepared. (Book of Chen (Chenshu), Annals 陳書 卷6 禎明2年 十一月)
An edict launched the campaign against Chen, which had seized the Jiangnan region and ruled tyrannically, and ordered the army to march. (Book of Sui (Suishu), Imperial Annals 隋書 卷002 帝紀 開皇8年3月)
After reporting at the ancestral temple, Yang Guang, Prince of Jin, Yang Jun, Prince of Qin, and Yang Su were appointed Acting Marshals to begin the campaign against Chen. (Book of Sui (Suishu), Imperial Annals 隋書 卷002 帝紀 開皇8年10月)
The Prince of Jin set out from Liuhe, the Prince of Qin from Xiangyang, and Yang Su from Xinzhou and other routes; in total there were ninety commanders and 518,000 troops. (Book of Sui (Suishu), Imperial Annals 隋書 卷002 帝紀 開皇8年10月)
Korean Peninsula (1)
In the first year of Emperor Sushun, Baekje sends envoys and the monk Hyechong and others, who present relics (śarīra) and pay tribute (Nihon Shoki (Chronicles of Japan) 日本書紀 卷第廿一 崇峻紀 1年 단락19)