Why did americans call the war of 1812 the “second war for independence”?

The Americans called the War of 1812 the "Second War for Independence", because the War of 1812 was against the British (which was their previous rulers). 1812 was when the British once again tried to take back the Colonies.

The US won once again, and it was known of the "SWfI" because it was against Britian (which was the strongest nation during that time

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