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Which war resulted in territorial gains for the United States that caused sectional conflict in the years leading up to the Civil War?

Respuesta :

IsJixo
The mexican war resulted in additional territory and their was controversy in whether slavery should be allowed in the new territory.

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AnimeBrainly
The Mexican-American War will be your answer

This war took place in the south west, from Texas to California, all the way to Mexico City

hope this helps