13 events the sources record for this year, grouped by region.
What happened
China (2)
The First Emperor went to Jieshi and had Lu Sheng, a man of Yan, seek immortals; receiving the prophecy 'The one who will destroy Qin is Hu,' he had Meng Tian lead three hundred thousand men against the Hu and took the lands of the Henan. (Records of the Grand Historian (Shiji), Annals 史記卷006 秦始皇本紀)
The First Emperor went to Jieshi and asked the Yan native Lu Sheng for secrets of immortality, carved the Jieshi gate inscription, toured the northern frontier and entered by Shangjun. Following Lu Sheng's chart ('the one who will ruin Qin is Hu'), he had Meng Tian lead three hundred thousand against the Xiongnu. (Zizhi Tongjian (Comprehensive Mirror) 資治通鑑 卷007 (원문 단락 #535, -215년))
At the Campanians' entreaty Hannibal returns to Cumae with siege equipment and thoroughly devastates the neighborhood (Livy, History of Rome (Ab Urbe Condita) 23.36)