Siege of Kyiv
1036 CE.
Shown on the map at 50.450°, 30.524°.
The Siege of Kiev was conducted by Pecheneg Khanate against the capital of the Kievan Rus' defended by Prince Yaroslav the Wise, which took place in 1036. It ended in a crushing defeat for Pechenegs, which led to their annihilation.
Text from the Wikipedia article Siege of Kiev (1036), licensed CC BY-SA 4.0.