>I believe some of the surviving generals testified that if Munich hadn't happened, Hitler wouldn't have backed down, and the plan to depose him would have gone forward. Of course, these men were also trying to live through Nuremberg, so their honesty and reliability is questionable.

And they had similar ideas when remilitarizing the Rhineland.

I don't think their reliability is questionable. The military was a major arm of pre-Nazi German politics. And they were tentative of losing another war so soon after World War 1.

The issue was that France kept backing down. Even when Germany invaded Poland and France declared war, France didn't actually do anything. German generals were fearful of the French pushing through the western border while they were in Poland, and basically got lucky that didn't happen.

Then when they blitzed through Netherlands, Belgium, and France, the military leaders calmed down a lot since basically it all worked out.

But at any point pre-1940 if things went south and it looked like WW1 all over again, the military very likely would have couped Hitler.