What was the political challenge after the civil war

It was the issue of the expansion of slavery into the territories that made the conflict irrepressible. Which then political differences that led to control issues, states' rights and secession.

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the colonists were also expected to pay a tax to meet the costs of establishing and manning the borders of the proclamation line which led to the belief that the king had sided with the indians despite pontiac's rebellion, against the interests of the settlers. this contributed to the causes of the american revolution.