Analysis of information sources in references of the Wikipedia article "Starobilsk" in English language version.
In a series of mass executions in April and May 1940, Soviet secret police murdered an estimated 22,000 captive Polish military officers and soldiers, policemen, officials, intelligentsia and others. Conducted on the orders of Stalin's Politburo, the events came to be known as the Katyn massacre after the Katyn Forest where the first mass graves were discovered.The debate is available online.