The Serov Instructions featured instructions on a mass deportation by the Soviet Union of tens of thousands of people from the territories occupied in what year?
Serov Instructions: The so-called Serov Instructions (full title: "On the Procedure for Carrying out the Deportation of Anti-Soviet Elements from Lithuania, Latvia, and Estonia") was an undated top secret document, signed by General Ivan Serov, Deputy People's Commissar for State Security of the Soviet Union (NKGB). Serov Instructions:  The instructions detailed procedures on how to carry out the mass deportations to Siberia of June 13–14, 1941 throughout the Baltic States during the first Soviet occupation of 1940–1941.
i don't know