What military advantage did germany have over france at the beginning of world war ii ?

Germany propelled a fast, forceful assault , while France utilized obsolete channel fighting strategies.  

In the mid year and fall of 1940, German and British flying corps conflicted in the skies over the United Kingdom, secured in the biggest supported shelling effort to that date.

A noteworthy defining moment of World War II, the Battle of Britain finished when Germany's Luftwaffe neglected to pick up air predominance over the Royal Air Force in spite of long periods of focusing on Britain's air bases, military posts and, eventually, its regular citizen populace. England's definitive triumph spared the nation from a ground attack and conceivable occupation by German powers while demonstrating that air control alone could be utilized to win a noteworthy fight.