Siege of Lazarevsky
1840 CE.
Shown on the map at 43.900°, 39.336°.
The Siege of Lazarevsky (Adyghe: Уае зау; Russian: Оборона Лазаревского форта) took place on the night of 19 February 1840 (7 February O.S) during the Russo-Circassian War. Before the siege, the Circassians engaged in intense intelligence activities. After a 3-hour struggle, the Lazarevsky fortification was captured by the Circassians.
Text from the Wikipedia article Siege of Lazarevsky, licensed CC BY-SA 4.0.