Land mine invention by the Polish officer Józef Kosacki. His invention, known as the Polish mine detector, was used by the Allies alongside mechanical methods, to clear the German mine fields during the Second Battle of El Alamein when 500 units were shipped to Field Marshal Montgomery's Eighth Army. The Nazis used captured civilians who were chased across minefields to detonate the explosives. According to Laurence Rees "Curt von Gottberg, the SS-Obergruppenführer who, during 1943, conducted another huge anti-partisan action called Operation Kottbus on the eastern border of Belarus, reported that 'approximately two to three thousand local people were blown up in
First Battle of El Alamein and cities of Egypt, the base facilities of the Commonwealth forces and the Suez Canal. However, the Axis forces were too far from their base at Tripoli in Libya to remain at El Alamein indefinitely, which led both sides to accumulate supplies for more offensives, against the constraints of time and distance. Following their defeat at the Battle of Gazala in Eastern Libya in June 1942, the British Eighth Army, commanded by Lieutenant-General Neil Ritchie, had retreated east from the Gazala line into north-western Egypt as far as Mersa Matruh, roughly inside the border. Ritchie had decided not to hold