Dragon 1/35 German Pontoon Set (Premimun Edtion)Rivers form natural lines of defence, and the first task of any defender is to destroy strategic bridges over them. This happened early in WWII as German troops advanced across Europe. Although Germanys Blitzkrieg often moved with such speed that defenders were overwhelmed before they had a chance to demolish bridges, others were successfully blown up. This is where combat engineers called pioniers in Germany came into play. They were equipped with