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 captured and was then held against a series of Axis counter-attacks throughout the day. A small column of armour, motorised infantry, and guns then set off to raid Deir el Abyad and caused a battalion of Italian infantry to surrender. Its progress was checked at the Miteirya ridge and it was forced to withdraw that evening to the El Alamein box. During the day, more than 1,000 Italian prisoners were taken. On 12 July, the 21st "Panzer" Division launched a counter-attack against Trig 33 and Point 24, which was beaten off after a 2½-hour fight, with more than 600 German