Siege of Kahun
1840 CE.
Shown on the map at 29.333°, 69.250°.
The siege of Kahun was a siege of the isolated fort-town of Kahun, Balochistan, that lasted from 16 May until 28 September 1840, during the First Anglo-Afghan War. The outpost was defended by a battalion of 140 men in extremely hot, inhospitable conditions against an overwhelming native force until they were forced to capitulate.
Text from the Wikipedia article Siege of Kahun, licensed CC BY-SA 4.0.