Threat of nuclear conflict between NATO and states of Warsaw treaty led by Soviet Union hung over Europe during the cold war epoch. Soviet strategists believed in chances of the war with West and discussed theoretical possibility of preventive nuclear attacks. Most interesting documents from the point of view of historians will be published in the beginning of 2006 by decision of Poland. Polish Defense minister Radek Sikorsky signed the decree about declassification of 1700 secret archival folders of Organization of Warsaw treaty. The minister thinks "these documents must certainly become opened for all to let everyone know about military alliance dictated to Poland by former USSR". And the minister said that not all document would be declassified but only those which wouldn’t reflect negative for Polish defensive capacity. The press says the decision of the new Polish right-wing government might provoke the Kremlin’s displeasure and will not contribute to consolidation of relations between Russia and Czechoslovakia. That reacts particularly toward declassified plans of military operations of Socialistic countries is the West starts nuclear war against them. Kazimez Marzinkevic, the new Polish prime minister insists on Warsaw is not trying to provoke Russia, in spite of declassification of documents without agreement with Moscow. "Future must be built on the basis of the truth about past. If truth cripples international relations, it is bad. I am sure this will not mar our relationships with Russia".