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 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. June deportation: The June deportation (Estonian: "Juuniküüditamine" , Latvian: "Jūnija deportācijas" , Lithuanian: "Birželio trėmimai" ) was a mass deportation by the Soviet Union of tens of thousands of people from the territories occupied in 1940–1941: Baltic states, occupied Poland (mostly present-day western Belarus and western Ukraine), and Moldavia.
i don't know