9 events the sources record for this year, grouped by region.
What happened
China (4)
Liu Bei ascended the throne as emperor south of Wudan in Chengdu (the first year of the Zhangwu era; Zhuge Liang as Chancellor). (Records of the Three Kingdoms (Sanguozhi) 蜀書 先主傳 (卷32) 章武1년)
To avenge Guan Yu, Liu Bei campaigned against Wu; Wu Ban and Feng Xi defeated the Wu army at Wu and reached Zigui. (Records of the Three Kingdoms (Sanguozhi) 蜀書 先主傳 (卷32) 章武1년)
The Han ruler sent Wu Ban and Feng Xi, who defeated Wu generals Li Yi and Liu A at Wu, advancing to Zigui with forty thousand troops; the Wuling Man also requested troops. (Zizhi Tongjian (Comprehensive Mirror) 卷069 221년 단락12 제1문)
West Asia (2)
A spirit resembling Alexander the Great appeared on the Ister's banks and, with a procession of 400 men with thyrsi, passed through Moesia and Thracia in daylight as far as Byzantium, with no official or soldier stopping it (Cassius Dio, Roman History 80(79).18.1)
The spirit of Alexander crossed by ship to Chalcedonian territory, performed night rites, buried a wooden horse and vanished (Cassius Dio, Roman History 80(79).18.3)
Southern Europe (3)
Elagabalus brought his cousin Bassianus to the Senate with Maesa and Soaemias at his sides, adopted him and renamed him Alexander by the god's command (Cassius Dio, Roman History 80(79).17.2)
The soldiers, scorning Elagabalus's women's dress and dancing, turn to the prudent Alexander and protect him. His mother Mamaea even checks his food herself. (Herodian, History of the Empire 5.7)
Regretting his adoption of Alexander, he casts him off and orders the Senate to strip him of the title Caesar, but only silence follows (Historia Augusta Heliog. 13.1, 13.2)