This is not mere ancient history. It is playing out today, and not just in the consequences of British (or French, or German, or American) imperial misadventures. It informs our Western portrayal of the "East" and our understanding of its peoples. We still see ourselves as the civilized world, the bearers of universal values. And we still portray the "East" as less civilized, more prone to violence, less respectful of human life and liberty.
The War of 1812 didn't gain America much, as a country. It didn't address the complaints that led the Americans to declare war in the first place. We didn't conquer Canada. But we did gain a certain amount of what can be called our "national identity" after the war. Right at the heart of this was a new patriotic (and popular) song.