Siege of Birtvisi
1403 CE.
Shown on the map at 41.609°, 44.539°.
The siege of Birtvisi was a siege laid by the Timurid sultan, Timur, against Birtvisi Fortress in eastern Georgia in 1403, as part of the Timurid invasions of Georgia from 1386 to 1403.
Text from the Wikipedia article Siege of Birtvisi (1403), licensed CC BY-SA 4.0.