Original sentence: The operation of Soviet partisans in the former eastern territories of the Second Polish Republic is covered in the Ukraine and Belarus sections of this article as these territories were claimed by the USSR on the basis of the Ribbentrop-Molotov Pact in the period between 1939 and 1941
Edited sentence: The operation of Soviet partisans in the former eastern territories of the Second Polish Republic is covered in the Ukraine and Belarus sections of this article as these territories were attached to the Ukrainian and Belarusian Soviet Republics prior to the onset of the Great Patriotic War.This section deals with the interaction of partisans with the Polish national forces and the local population