Song Zhun of Song Dynasty China completes the work of the earlier geographer Lu Duosun, an enormous atlas of China that is written and illustrated in 1,556 chapters, showing maps of each region, city, town, and village (the atlas took 39 years to complete).
In the Chola dynasty, the first votes are celebrated by adding a ballot in an urn.
Autumn – Basil Mesardonites visits Guaimar III of Salerno to secures his cooperation. Melus is forced to flee again. Basil proceeds to Monte Cassino - and persuades Abbot Atenulf to expel Dattus. Pope Sergius IV support Dattus with papal troops to garrison the tower on the Garigliano River, a fortified complex in the territory of the Duchy of Gaeta.
December 25 – Sweyn Forkbeard takes control of the Danelaw and is proclaimed king of England in London. Some of the English provinces refuse to pay homage to Sweyn, who has no dynastic right to claim the throne.
July 29 – Battle of Kleidion: Basil II defeats the Bulgarian forces between the mountains of Belasitsa and Ograzhden near the town of Kleidon. By order of Basil almost 15,000 prisoners are blinded, Tsar Samuel survives the battle but dies of shock. Basil earns the nickname "Bulgar-Slayer".
Sviatopolk I dies and is succeeded by his brother Yaroslav I (the Wise). He becomes with the support of the Novgorodians and the help of Varangian (Viking) mercenaries the Grand Prince of Kiev. Yaroslav consolidates the Kievan state through both cultural and administrative improvements, and military campaigns.
Japanese statesman and regent Fujiwara no Michinaga retires from public life, installing his son Yorimichi as regent. Michinaga, however, continues to direct affairs of state from his retirement, and remains the de facto ruler of Japan, until his death in 1028.