How did the American victory in the war of 1812 increase the country's prestige abroad

   It helped promote a new sense of American nationalism. It also showed that America would rest any grievous wrongs committed against it.

Explanation:

As a result of the victory obtained by the US in the war of 1812, we can affirm on the one hand that a great feeling of nation and unity was born in the country, and on the other hand after seeing the result of the war, any country would question again the sovereignty of the USA because it made a great show of strength.

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