Germany made its own submarines and had been doing that since the days of WW 1, long before Hitler.
Hitler Came To Power I Think
von Hindenburg was in power but when he died Hitler came into power
Hitler's closest army officers believed Hitler's assassination was the last chance to end the war before it came to Germany.
Joseph Goebbels
Edmund, Otto and Gustav were his brothers. All were dead before Adolf came to power in Germany.
Hitler came into power in 30th January 1933 but I'm not sure what message he said
Presumably, most of them would have tried to get out of Germany before Hitler came to power. (They were in no position to prevent him coming to power).
Albert Einstein
Adolf Hitler and nasi party came into power in Germany after the time of "great depression" in Germany. On the morning of 30 January 1933, in Hindenburg's office, Adolf Hitler was sworn in as Chancellor during what some observers later described as a brief and simple ceremony.
Albert Einstien
Certainly before Germany; Japan was already invading China in 1933...Hitler came to power in 1933.