Siege of Calcutta
1756 CE.
Shown on the map at 22.541°, 88.338°.
The siege of Calcutta was a battle between the Bengal Subah and the British East India Company on 20 June 1756. The Nawab of Bengal, Siraj ud-Daulah, aimed to seize Calcutta to punish the company for the unauthorised construction of fortifications at Fort William. Siraj ud-Daulah caught the Company unprepared and won a decisive victory.
Text from the Wikipedia article Siege of Calcutta, licensed CC BY-SA 4.0.