Yes, If country A invades country B with the intent to conquer them, that is good enough reason to justify country B choosing to go to war with country A.
He set the bar for generations of good Jazz and invented what he called "American Music."
From Europeans because the Europeans brought slaves from Africa to sell to America
The name "flapper" was given to newly independent women who broke away from conventions during the 1920s.
True. He did bring a sense of fairness to his people in order to establish his society.