How did the aztecs use slaves to benefit their economy?

What new concept did the the american revolution introduce into the world

Plz which of the following statements about the fugitive slave act of 1850 is not accurate? a. marshals you refuse to arrest a suspected fugitive could be find $1000. b. slave owners had to present evidence an african-american in the north was a fugitive slave. c. any person who provided food or shelter to a fugitive slave could be find $1000 and placed in jail for six months. d. it required of federal marshals to arrest any african-american suspected of being a runaway slave.

Notice that nuetral belgium is located between germnay and france.how do you think belgium and the rest of the world regarded germany's violation of belgiums neutrality ?