Complex sentence: Daugavpils was part of the the Soviet Union between 1940--41 and 1944--1991, and was occupied by the Germans between 1941--44.Germans established the Daugavpils Ghetto where the town's Jews were forced to live.
Split into simpler sentences: Daugavpils was part of the the Soviet Union between 1940--41 and 1944--1991, and was occupied by the Nazis between 1941--44. The Nazis established the Daugavpils Ghetto where the town's Jews were forced to live.