The 30.1.1933 He was chancellor but still Controlled by a other politicians. He Then Started to Change the laws so He could more easily Control Germany (e.g. He forbid other policial Parties). On the 2.8.1934 the President Hindenburg died and Hitler one day later decided that He would also be President now. Starting at that Point, He was Not Controlled any more.
What time period? maybe with a little more info I can help you
Its the one that is very cool
The main reason why the United States was able to assert itself on the World Stage after WWII was because the US emerged from the war with an incredibly high GDP, thanks mostly to war-time spending. This allowed the US to act as a world leader because so much else of the world had been crippled economically.