The best documented of these massacres took place on 20–21 June 1940, when 358 members of the Polish political, cultural, and social elite were murdered in a single operation.
其中记录最为全面的屠杀事件发生在1940年6月20日至21日，当时有358名政治、文化和社会领域的波兰精英在单一一次行动中被杀害。