What if Poland recognized that war with Germany would be inevitable if Germany violated the Munich Agreement, prepared for the possibility of Germany taking the whole country, and launched an invasion of Slovakia just hours after Germany entered Czech to prevent Germany from surrounding them on three sides? This as opposed to just taking a little but of Slovakia as in OTL. Poland says they are doing this to protect Slovakia or something.
Would Germany go to war with Poland over this on the spot? Would Britain and France blame Poland?
And if this Poland did get away with it, how much stronger would Poland's position vis a vis Germany be? Would the German equipment and manpower losses in Poland be far worse than in OTL?