 Forced labour was introduced, and the authorities confiscated the estates of Greek landowners and gave their land to Bulgarian peasants (many of them brought from Bulgaria as settlers).These policies led to an attempt to expel the Bulgarians with a spontaneous and badly organized uprising around Drama in late September 1941 (primarily guided by the Communist Party of Greece) which, however, was suppressed by the Bulgarian Army, and massive reprisals against Greek civilians followed.By late 1941, more than 100,000 Greeks had fled from the Bulgarian occupation zone.