Why did Hitler take over Rhineland and Sudetenland?

To one's knowledge, other than gaining land from Poland to expand from.Hitler wanted to take over Europe, and eventually the world if possible. He considered all others (everyone) in the world to be inferior to the Germans. He wanted to create a "Aryan" race of blond hair blue eyed human beings who all spoke German. Countries such as Czech/Slovak Hung, Poland, were mere stepping stones in his plans for New World Order.