 Complete the following phrase:  After the March 1944 German invasion of Hungary, the flow reversed and Slovak and Hungarian Jews fled back across the border to Slovakia. At this time, the approximately 800,000 Jews as defined by race in Hungary was the largest surviving population in Europe. The Jews in Hungary had been subjected to strict antisemitic legislation and tens of thousands had been murdered, both young men conscripted into labor battalions and foreign Jews deported to 