Operation Hornung was an anti-partisan operation during the Occupation of Belarus by Nazi Germany, carried out in February 1943. It was directed against the area Hancewicze-Morocz-Lenin-Łuniniec, a thinly populated area of about 4,000 square kilometers southwest of Słuck on the southern border of the Regional Commissartiat White Ruthenia. It came in the sequence of three actions (including Erntefest I and Ernterfest II) that had taken place in January further to the northeast, in the area of Słuck-Osipowicze; it claimed over 4,000 victims.