The American victory at the war of 1812 led to a rise in nationalism because "it gave the Americans the good feelings or extreme pride to fight for what was theirs."
This is because the war of 1812 was generally considered war the Americans were not fully prepared for.
Also, unlike the American war of Independence, there were no allies to help them.
Despite fighting alone, the Americans were still able to fight the British Army to a draw.
During this period, the British Army was considered the greatest army in the world.
Hence, in this case, it is concluded that the War of 1812 against the British triggered the rise of nationalism among Americans.
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