Genocide of the Ingrian Finns
The genocide of the Ingrian Finns (Finnish: inkeriläisten kansanmurha, Ingrian: inkeriläisiin kansaamurha) was a series of events triggered by the Russian Revolution in the 20th century, in which the Soviet Union deported, imprisoned and killed Ingrian Finns and destroyed their culture. In the process, Ingria, in the historical sense of the word, ceased to exist.
Source: Wikipedia — Genocide of the Ingrian Finns (CC BY-SA 4.0)