What military advantage did the union have over the confederacy in the was

Plz ! after the first battle of bull run general ivan mc dowell was removed from command of the union army he was replaced by a. general ulysses s. grant. b. general george mcclellan. c. general robert e lee. d. general george meade.

Which three of these issues did europe face after the war? *all that apply* a. a worldwide pandemic b. monarchy in britain c. communism in russia d. a worldwide cancellation of debts e. dislocated refugees

What happened at tiananmen square june 4th 1989