Originally posted by: BeauJangles
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While Britain was dealing with her own crises, she turned her back on France who was unwilling to stand up to Hitler on their own. Hitler openly defied the Versailles treaty, expanded the army, established the air force, and began constructing a massive fleet of ships. His army embraced mobile warfare, built tanks (illegal under the Versailles treaty), and trained in the open. France, already concerned about her ability to protect herself and unwilling to provoke another war did nothing. Without support from the US or Britain, France felt it couldn't win a conflict with Germany. Combine that sentiment with their sympathy towards the German fate and the country was immobilized.
Basically, Hitler played Britain and France like a fiddle. He appealed to their sympathies and knew that their scars from the previous war preoccupied them too much. He openly defied their treaties, which only emboldened him further. When push came to shove, France lost the best opportunity to stop Hitler when he remilitarized the Rhineland. If France had moved a muscle, sent a division, or done ANYTHING, Hitler would have been cast out of power.