Where did most Americans that flew planes in WWI train at ?

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.

Which would be good historical evidence when studying manifest destiny?

During industrialization which led to an exploration of new economic theories