Final answer:
While the precise information about Parczew is not provided, it is known that ghettos were established in Polish towns to control Jewish populations, and special units like the Einsatzgruppen were involved in deportations and executions during the Holocaust.
Step-by-step explanation:
The question regarding the number of Jews who lived in Parczew, the existence of a ghetto there, and the identity of the military unit responsible for their deportation pertains to the period of the Holocaust during the Second World War. Although specific information about the Jewish population in Parczew and the details of their deportation is not provided in the reference material, it is known that the Nazis established ghettos in Polish cities and towns swiftly after their invasion in 1939. Ghettos such as the one in Warsaw, which housed over 400,000 Jews at its peak, were constructed to confine and control Jewish populations before deportation to concentration camps and death camps like Treblinka and Auschwitz.
Special execution squads known as Einsatzgruppen would conduct mass executions and deportations. Jews living in ghettos faced deplorable conditions, with starvation and disease rampant. Eventually, many were sent to death camps where they were murdered, contributing to the estimated 6 million Jews killed during the Holocaust.