What law banned slavery anywhere in united states

Ahistorian claims massive drought and famine in china caused the boxer rebellion. which of the following historians is making a counterclaim?

Why did the outbreak of world war 2 create a need for new military bases across the country?

When this was published in early 1776, many american colonists became convinced that they should act to form a new kind of nation independent from the rule of britain's "cruel" courts