Europe
Adolf Hitler. Who was part ironicly part Jewish
Hitler served in the German army during World War One.
Vienna
Hitler wasn't part of world war I. He emerged as a savior to the German people before WWII.
7 years
He was a soldier during WW 1.
The Sudetenland
Hitler is responsible for starting World War 2 by invading Poland and violating the Versaiiles Treaty.
Hitler was defeated in the world war II. The second part of your questions is unclear unless you tell us who is "they"
There no record of antisemtism on Hitler's part till the end of World War 1, when he was 29.
Yes, Hitler's Nazi Germany was part of the Axis during World War 2, with Japan and Italy.