Why did hitler take over most of europe?

To make up for Germany's lost from WW1

Explanation:

In World War I, Germany lost World War 1 and they were sore losers. They were mad that they lost the world and Adolph Hitler believed that it was all the Jews fault the economy failed for Germany. So, the Germans voted Hitler to lead Germany. The Nazis trained little children to be future Nazi soldiers. Later on Adolph and the Nazis invade countries in Europe, took the Jew who lived there and made them suffer in concentration camps. That's where the holocaust happen.

b. the 200th birthday of the united states

a is the final : )