Why was the USA considered an "empire" ?

I give Brainliest!

The black hawk war began (20 points) a. sauk leaders signed the treaty of dancing rabbit creek. b. congress passed the indian removal act. c. the sauk moved onto a village established by white settlers. d. federal officials ordered the removal of all american indians from illinois.

Explain the strengths of the articles of confederation and how people reacted to this document. ! ^^^ 10 points

What something thats on the news, and is going on currently?