Operation Volcano (Hebrew: מבצע הר געש‎‎, Mivtza Har Ga'ash), also known as Operation Sabcha, was a large-scale Israel Defense Forces (IDF) military operation carried out on the night of November 2–3, 1955 against Egyptian military positions in and around the Nitzana/Auja vicinity. The operation was successful and resulted in the permanent expulsion of Egyptian forces from the Demilitarized Zone. Eighty-one Egyptian soldiers were killed and fifty-five others were taken prisoner. There were five Israeli fatalities.