Which system keeps one country from dominating the others.

After the supreme court’s ruling on the dred scott case, many people in the north believed that a. slavery might become legal everywhere. b. slavery might be banned everywhere. c. formerly enslaved people would move to the north. d. formerly enslaved people would stay in the south.

Name three new weapons that changed how ww! was fought and how?

Were african-americans allowed to serve in the military in wwi?