Poland, which had a history of being carved up by Germany and Russia, was well aware of the threat posed by the Nazis. In fact, as early as January 1934, it tried to to avert this danger by concluding a non-aggression pact with Hitler.

Like all other diplomatic attempts to deal with the Nazis it was doomed to failure. In the ensuing years, Hitler's demands became increasingly stronger.

Poland, however, made two vital mistakes in this period:

1. It depended on a coalition, which included England and France, to provide for its defense. It also expected aid from the League of Nations.

2. It kept its army too small and too ill equipped.

If your contention is that America should strengthen its military to be able to deal with all possible threats without reliance on international organizations and foreign allies, I thoroughly agree with you.