Wally strategic planning presumed a semi-defensive war fought in Belgium or beyond, Belgium trying to do neutrality and re-enact WW1 fucked this up. the Saar offensive (and all other possible offensives on the french border) a) butted into the German defenses--hard fighting b) dislodged troops from a position of strength on the Maginot.

off of the franco-german border, the Wallys were perfectly prepared to engage the Axis, the naval war was hot, and a naval blockade was initiated. the blockade especially indicates Wally intentions, you'd hardly expect a germany cut off from the rest of the world to invade the USSR and win