The battle of new orleans established a great wave of nationalism in america, even though it occurred after a peace treaty was signed.

Yes, it is true that the Battle of New Orleans established a great wave of nationalism in America, even though it occurred after a peace treaty was signed, since this took place during the War of 1812, when America showed its dominance to the world by once again standing "tall" in front of the British Empire. This particular battle made Andrew Jackson a war hero. 

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