What role did the treaty of versailles play in the causes of world

What role did the Treaty of Versailles play in the causes of World War II? Who were the major players (countries) in the war? What was Roosevelt’s stance as the war began? What led to the United States’ involvement in the war? What affects did World War II have on the U.S. both during and after the war?

500 words in length. Remember to double space your work and proofread for errors in spelling, grammar, punctuation, structure, etc. All sources must be cited (proper footnotes and works cited page)