Growth of the Land-wasser-schlepper (Land-Water-Tractor) started in 1936, but the first 7 vehicles were completed in July of 1940. One more 14 were created by March of 1941. It was designed by Rheinmetall-Borsig as an amphibious car to be used by engineers however it lacked storage space and loading/unloading access. To conquer this problem, unique 10 and 20 ton amphibious trailers had been made. It carried three to five men crew and 20 people. Another issue ended up being that it was unarmored and might not operate efficiently within the combat area. LWS saw service in Russia and North Africa .