Development of the Land-wasser-schlepper (Land-Water-Tractor) started in 1936, however the very first 7 automobiles had been finished in July of 1940. One more 14 had been produced by March of 1941. It had been designed by Rheinmetall-Borsig as an amphibious vehicle to be utilized by engineers nonetheless it lacked storage space and loading/unloading access. To overcome this dilemma, unique 10 and 20 ton amphibious trailers was made. It carried three to five men crew and 20 individuals. Another problem wound up being it was unarmored and may not operate effectively inside the combat area. LWS saw solution in Russia and North Africa .