On the 5th month, day wuwu, he received the abdication of Emperor Xiaojing and ascended the throne at the southern suburb of Ye, founding Northern Qi and changing the 8th year of Wuding to the 1st year of Tianbao. (Book of Northern Qi (Bei Qishu), Annals 北齊書 卷4)
On the 9th month, day gengwu, the emperor went to Jinyang and paid respects at the mausoleum. Afterwards he traveled between Ye and Jinyang every year. (Book of Northern Qi (Bei Qishu), Annals 北齊書 卷4)
On the 11th month, Yuwen Tai led his army to Shancheng, split his cavalry to cross northward, and reached Jianzhou. (Book of Northern Qi (Bei Qishu), Annals 北齊書 卷4)
On day bingyin, Gao Yang led his troops out and camped east of the city. Seeing the army's strict discipline, Yuwen Tai sighed, 'Gao Huan is not dead,' and withdrew. (Book of Northern Qi (Bei Qishu), Annals 北齊書 卷4)
Gao Yang (Emperor Wenxuan) ascended at the southern suburban altar, founding Northern Qi and changing the era. (The source continues with a presentation at Ye, 鄴下 適作, left as given.) (History of the Northern Dynasties (Beishi), Annals 北史 卷7 天保元年)
Chen Baxian set out from Shixing, crossed the Dayuling, crushed Cai Luyang who had camped at Nanye, and took up his post at Nankang. (Book of Chen (Chenshu), Annals 陳書 卷1 大寶元年 正月)
When Goguryeo took Geumhyeon fortress, Isabu was ordered to retake two fortresses, rebuilt them, and stationed a thousand armored men to hold them. (Samguk Sagi (History of the Three Kingdoms) 卷04 眞興王 11年)
Southern Europe (4)
Totila besieged Rome; three thousand elite troops under Diogenes defended it, but the Isaurians opened the gates. (Procopius, History of the Wars 7.36.1)
Three thousand Slavs crossed the Ister, then crossed the Hebrus river and split in two. (Procopius, History of the Wars 7.38.1)
The Goths attacked the fortress of Rhegium but were driven back by the defenders; Totila left a small force and moved on. (Procopius, History of the Wars 7.39.1–7.39.2)
While Germanus was gathering troops at Serdica, a large Slavic army crossed the Ister and advanced to Naissus. (Procopius, History of the Wars 7.40.1)