I have always wondered if there was any possible way that Eastern Europe could have found itself in a better situation than it did at the dawn of WWII.
Is it possible for countries like Poland, Yugoslavia, Czechoslovakia, and maybe even Hungary to sign a mutual defense agreement in the 1920s or early 1930s? For something like this to work I think these countries would have to begin to rearm and upgrade their militaries as well.
Does this alliance have any noticeable effect on WWII? Does Germany have a harder time in the Balkans and Eastern Europe?