Battle of Levounion: the end of the Pechenegs
Byzantium and the Cumans wipe out the Pecheneg horde in a day

For two centuries the Pechenegs raided Rus' and Byzantium; in 1036 Yaroslav the Wise defeated them outside Kyiv. On 29 April 1091 Alexios I Komnenos and his Cuman allies all but annihilated their horde in Thrace, and the Pechenegs vanished as a people.
Wikipedia (Russian) · Wikipedia (English) · 11th century
Meanwhile around the world (±25 years)
Eastern Europe & Russia
- 1113 Vladimir Monomakh in Kiev — 22 years later
- c. 1113 The Primary Chronicle — 22 years later
Middle East
- 1071 Battle of Manzikert — 20 years earlier
- 1099 Crusaders capture Jerusalem — 8 years later
Africa
- c. 1070 The Almoravids found Marrakesh — 21 years earlier
Asia
- c. 1113–1150 Construction of Angkor Wat — 22 years later
Alive at the time
- Omar Khayyam (aged 43)
- Henry IV (aged 41)
- Vladimir II Monomakh (aged 38)
- Vsevolod I (aged 61)
- Shen Kuo (aged 60)
- Anselm of Canterbury (aged 58)
- Sviatopolk II (aged 41)
- Philip I (aged 39)
- Nestor the Chronicler (aged 35)
- William II Rufus (aged 35)