Why did the world war 2 happen

I think you should check the explanation that is on search like when you open your phone

Hitler's invasion of Poland in September 1939 drove Great Britain and France to declare war on Germany, marking the beginning of World War II. Over the next six years, the conflict would take more lives and destroy more land and property around the globe than any previous war!

(sorry wrote this as a comment!)

1. they could both use a veto to cancel an action.

2. women couldn't vote in the roman republic but could in the united states

the correct statement regarding the federal court systemis that ' congress has the power to create new federal courts.