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 with dug-outs and surrounded by minefields and barbed wire) the most developed being around the railway station at Alamein. Most of the "line" was open, empty desert. Lieutenant-General William Norrie (General officer commanding [GOC] XXX Corps) organised the position and started to construct three defended "boxes". The first and strongest, at El Alamein on the coast, had been partly wired and mined by 1st South African Division. The Bab el Qattara box—some from the coast and south-west of the Ruweisat Ridge—had been dug but had not been wired or mined, while at the Naq Abu Dweis box (on the edge