5 events the sources record for this year, grouped by region.
What happened
China (2)
The Wuhu man of Hepu and Jiaozhi rebelled, drew in the people of Jiuzhen and Rinan, and attacked and took the commandery and county seats. (Book of the Later Han (Hou Hanshu), Annals 後漢書卷8 孝靈帝紀 光和1年)
They opened the 'Western Mansion' (Xidi) and began selling offices, starting with the Guannei Marquis, with entry payments in cash. (Book of the Later Han (Hou Hanshu), Annals 後漢書卷8 孝靈帝紀 光和1年)
Southeast Asia (1)
The people of Zhu and the Wuhu barbarians rebelled for a long time, and Yang Long and others took advantage to rise in arms. (Đại Việt sử ký toàn thư 外紀卷之三 「戊午〔漢靈帝宏光和元年〕夏四月，」)
Southern Europe (2)
Marcus set out after the rite of hurling the bloody spear at the temple of Bellona, sent Paternus with a large army to the front, and was hailed imperator for the tenth time (Cassius Dio, Roman History 72(71).33.3)
For the next three years he fights the Marcomanni, Hermunduri, Sarmatians and Quadi; it is said that had he lived one more year he would have made them provinces (Historia Augusta Marc. 27.10)