Munshiganj Raebareli massacre
The Munshiganj Raebareli massacre was a massacre perpetrated by the Indian Imperial Police on 7 January 1921 at Munshiganj, Raebareli, India. The official death toll as per British historians was minimal, while other estimates put the death toll in the hundreds.
Source: Wikipedia — Munshiganj Raebareli massacre (CC BY-SA 4.0)