alternatehistory.com

In 1940 the Germans were working out a plan for the invasion of Belgium, Luxemburg, the Netherlands and France.
In January 1940 the initial plans for the invasion were recovered by the Allies, as a German plane carrying them landed in Belgium by mistake due to bad weather conditions.
The entire German plan was until then based on an invasion through Belgium. Following this development, the plan was revised and the initial Manstein-Guderian-plan was reconsidered and in the end adopted. The Germans went through the Ardennes.

So what if that plane never landed in Belgium and the plans were never recovered by the Allies? Let's say that the fog was not that bad or the pilot noticed the Rhein and corrected his course.

How would this influence the result of the war?
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