Complex sentence: Following the war, Berihah ("escape"), an organization of former partisans and ghetto fighters was primarily responsible for smuggling Jews from Poland and Eastern Europe to the Italian ports from which they traveled to Mandatory Palestine.
Split into simpler sentences: Following the war, Berihah ("escape"), an organization of former partisans and ghetto fighters was primarily responsible for smuggling Jews from Eastern Europe through Poland. The refugees were sent to the Italian ports from which they traveled to Mandatory Palestine.