What was the strategic advantage of conquering Poland during WW2?

Answer 1

Poland in itself was not strategic...Germany,however, had lost the city of Leipzig to Poland after WW1 as well as Prussia and a fair chunk of itself. Getting it all back was the reason. Hitler had decided that the Aryans needed living space, and since the Poles were sub-human anyway, no one would miss them. He didn't need all of Czechoslovakia either.

Answer 2

The Germans simply wanted to reclaim what had been taken from them in the Treaty of Versailles at the end of WWI. There was a slight strategic bonus to this in that it put them closer to Russia for the later invasion but that was not the main intention of the invasion.