How did the war of 1812 first divide and then unite the Nation?

Causes of the War of 1812. At the outset of the 19th century, Great Britain was locked in a long and bitter conflict with Napoleon Bonaparte's France ... In 1809, the U. S. Congress repealed Thomas Jefferson's unpopular Embargo Act, which by restricting trade had hurt Americans more than either Britain or France.

i don’t know if am correcy