Eichenfeld massacre: Members of the Revolutionary Insurgent Army of Ukraine murder 136 Mennonite colonists at Jaskyowo, initiating a series of massacres that resulted in the deaths of 827 Ukrainian Mennonites.

The Eichenfeld massacre was a 1919 attack against the Mennonite colonists of Eichenfeld by the Revolutionary Insurgent Army of Ukraine. Rising tensions between the native Ukrainian peasantry and Mennonite landowners had culminated with attacks on the latter, as insurgents took control of southern Ukraine and began carrying out reprisals against those that had collaborated with the Central Powers and the White movement.