What was Hitler's mission?

Answer 1

To get back land lost in World War 1, to show the world how powerful Germany really was and to get back on the countries who had previously invaded Germany.
His primary goal was the forcible acquisition of Lebensraum (living space) for the German people. Secondly, he desired some kind of final reckoning with the Jews.

Answer 2

Hitler's mission was to overcome his personal failures by building great power to assuage his ego. He used the social and economic strife in Germany that followed their defeat in WWI to show the world his power and punish those responsible who had not appreciated his talents and abilities. He used lies, deceit, and murder as his stepping stones; he used Germany's own weaknesses as his tools. He accomplished his mission for a few brief years before his efforts completely destroyed Germany, killed unknown millions of Europeans (including Germans), and left much of Europe in rubble. See the related question linked below.

Answer 3

Take over the world and eliminate the Jewish people.