In the wake of World War II, HIAS assumed its most massive job to date – assisting with the emigration needs of the approximately 300,000 Jewish displaced persons throughout the former war zone. Nearly every surviving Jewish family in Central and Eastern Europe had been separated, with parents and children scattered throughout many countries. Reuniting them so they could emigrate as a unit was one of the primary tasks for HIAS workers in the field. Obtaining documents required for emigration was difficult as throughout the war people had fled from one place to another, escaped from concentration camps to hide in villages and forests, then reappeared under assumed names. Identity papers were destroyed; false papers, fabricated papers, or, most often, no papers at all, were common. HIAS operations set up for DP work in Germany and Austria at the end of 1945 were the largest in the history of the organization in any one country, and they kept growing with the flood of refugees streaming out of Poland and Romania.