How did Germany violate the 1919 Trea3What caused World War 2 to begin in l939?

Answer 1

Germany violated the Treaty of Versailles (1919) in a few ways. The treaty limited how big the German military was allowed to be- and after the Nazis took power in 1933, they began making the military large and modern again.

Secondly, there is a region in western Germany called "the Rhineland", because the Rhine River goes through it. There are a lot of factories there, so it's a very important region for Germany. It also happens to border with France. So the Treaty also disallowed Germany from having any military forces there. Hitler famously ignored the treaty when he "remilitarized" the Rhineland in 1936.

However, less well known is that the Treaty disallowed Germany from having a general staff- that is, a high end organization to run the military, come up with strategies, and so on. After the Treaty was ratified and went into effect in late 1919, Germany, rather than comply with this restriction, simply renamed their general staff (to "Truppenamt", or "Troop Office") and continued doing things as they had done. So they violated the Treaty almost as soon as the Treaty went into effect!

As for what caused World War II to begin in 1939, it was when Nazi Germany (and the Soviet Union) invaded and occupied Poland. France and the United Kingdom had promised to come to Poland's defense if attacked, so when Germany invaded, those countries declared war on Germany.