According to info received by StampNews.com Polish Post commemorated one of the most tragic historical events - the Katyn massacre. The issue consisting of one stamp was released and put into circulation on the 7th of April.
The Katyn massacre was a series of mass executions of Polish nationals carried out by the People's Commissariat for Internal Affairs (NKVD), the Soviet secret police, in April and May 1940. Originally the term "Katyn massacre", also known as the Katyn Forest massacre, referred to the massacre at Katyn Forest, which was discovered first and was the largest execution of this type.
The massacre was prompted by NKVD chief Lavrentiy Beria's proposal to execute all captive members of the Polish Officer Corps, dated 5 March 1940, approved by the Soviet Politburo, including its leader, Joseph Stalin. The number of victims is estimated at about 22,000. The victims were executed in the Katyn Forest in Russia, the Kalinin and Kharkiv prisons, and elsewhere.
Of the total killed, about 8,000 were officers taken prisoner during the 1939 Soviet invasion of Poland, another 6,000 were police officers, and the rest were arrested Polish intelligentsia the Soviets deemed to be "intelligence agents, gendarmes, landowners, saboteurs, factory owners, lawyers, officials and priests".
In November 2010 the Russian State Duma approved a declaration blaming Stalin and other Soviet officials for having personally ordered the massacre.