Reinberger was carrying the first plans for the German invasion of western Europe which, as Gamelin had expected, entailed a repeat of the 1914 Schlieffen Plan and a German thrust through the Belgium (which was expanded by the Wehrmacht to include the Netherlands) and into France.
Reinberger medbragte et eksemplar af den første tyske plan for invasion af Vesteuropa, som i lighed med hvad Gamelin ventede, indeholdt en gentagelse af Schlieffenplanen fra 1914, dvs. et tysk fremstød gennem Belgien (som blev udvidet af Wehrmacht til også at omfatte Holland) og ind i Frankrig.