25 events the sources record for this year, grouped by region.
What happened
China (13)
The King of Han crossed the Yellow River at Linjin, accepted the surrender of King Wei Bao, and took Henei. (Book of Han (Hanshu), Imperial Annals 漢書卷001 漢高祖二年三月)
At Luoyang, heeding the counsel of Dong Gong, the elder of Xincheng, the King of Han proclaimed mourning for Emperor Yi, wept for three days, and announced his campaign against Xiang Yu to the feudal lords. (Book of Han (Hanshu), Imperial Annals 漢書卷001 漢高祖二年三月)
The King of Han united the forces of five lords and marched east; Peng Yue came over with thirty thousand men. Entering Pengcheng, he seized its beauties and treasure and held a great feast. (Book of Han (Hanshu), Imperial Annals 漢書卷001 漢高祖二年四月)
Xiang Yu led thirty thousand picked troops from Lu through Huling and Xiao and struck Pengcheng at dawn, routing the Han army on the Sui River; the river was dammed and would not flow, and the King escaped with a few dozen riders. (Book of Han (Hanshu), Imperial Annals 漢書卷001 漢高祖二年四月)
Fleeing in defeat, the King of Han took shelter at Xiayi with Lü Ze, Marquis Zhou Lü, brother of Empress Lü, gathered his troops and camped at Tang. (Book of Han (Hanshu), Imperial Annals 漢書卷001 漢高祖二年四月 이후)
The King of Han camped at Xingyang; Han Xin gathered his forces and joined him. Between Jing and Suo he defeated the Chu army and built a covered road to carry grain from the Ao granary. (Book of Han (Hanshu), Imperial Annals 漢書卷001 漢高祖二年五月)
Flooding Feiqiu by diverting the river, the city surrendered and Zhang Han took his own life; Yongzhou was pacified. (Book of Han (Hanshu), Imperial Annals 漢書卷001 漢高祖二年六月)
Han Xin and Zhang Er went down the Jingxing Pass to attack Zhao, killed Chen Yu and captured King Xie; they set up the Shangshan and Daijun commanderies. (Book of Han (Hanshu), Imperial Annals 漢書卷001 漢高祖三年十月)
The King of Han entered Pengcheng with the forces of five lords, fifty-six myriads; Xiang Yu attacked at dawn near Xiao and routed him heavily, and more than a hundred thousand Han soldiers fell into the Sui River, so the water stopped flowing. (Records of the Grand Historian (Shiji), Annals 史記卷007 項羽本紀)
The King of Han crossed the Yellow River from Linjin, made Wei follow him, reached Luoyang, proclaimed the mourning for the Righteous Emperor, and appealed to the feudal lords to attack Chu. (Records of the Grand Historian (Shiji), Annals 史記卷008 高祖本紀)
Elara, a Tamil noble from the Chola country, defeated Asela and ruled Anuradhapura justly for 44 years. (Mahavamsa (Great Chronicle of Sri Lanka) 21.11-13)tradition
Nandhimitta, nephew of Elara's general Mitta, chose to side with the princes of Rohana instead of destroying Tamil temples, and went over to Gamani. (Mahavamsa (Great Chronicle of Sri Lanka) 23.9-15)tradition
King Kakavannatissa stationed garrisons at every Mahaweli ford to block the Tamils, and appointed Dighabhaya chief of the Kacchaka ford. (Mahavamsa (Great Chronicle of Sri Lanka) 23.16-18)tradition
When King Kakavannatissa died at Tissamaharama, his younger brother Tissa came from Dighavapi and took back their mother and the elephant Kandula; Gamani was crowned king at Mahagama. (Mahavamsa (Great Chronicle of Sri Lanka) 24.12-17)tradition
Gamani and his younger brother Tissa fought a great battle at Kulanganiya-pitthi, and thousands of Gamani's soldiers died. (Mahavamsa (Great Chronicle of Sri Lanka) 24.19)tradition
At Mahagama the brothers clashed again; Gamani, on horseback, leaped over the elephant Kandula, and Tissa fled. (Mahavamsa (Great Chronicle of Sri Lanka) 24.31-38)tradition
The brothers reconciled before the monks at Dighavapi and ate together; afterwards Tissa supervised the harvest. (Mahavamsa (Great Chronicle of Sri Lanka) 24.57-58)tradition
As soon as peace was made, news reached Philip that the Romans were at Dyrrhachium and the Parthini and others were besieging Dimallum (Livy, History of Rome (Ab Urbe Condita) 29.12)