Concealed German heavy tanks break out to start an attack on Somme Line, morning of June 5, 1940. A German plane, "Fieseler-Storch", on reconnaissance mission shows terrain of combat below. German Panzer vehicles advance from southern slopes of Somme River. Detailed animation shows the situation of Weygand Line and disposition of army group Van Bock, Van Rundstedt before breakthrough to Rouen.