sentences:  According to the German Federal Archives 100,000 to 120,000 civilians were killed during the wartime flight and evacuation from the territory east of the Oder Neisse line.In most cases, however, the implementation of the plans was either delayed until Allied forces had already advanced into the areas to be evacuated, or it was prohibited entirely by the Nazi apparatus.Despite the rapid advances of the Red Army, the German authorities in many areas forbade leaving one's place of residence without a permit and an officially valid reason.