If the US had lost the war of 1812, it would have had terrible ramifications for the new country. Thomas Jefferson, for example, continued to argue...

If the US had lost the war of 1812, it would have had terrible ramifications for the new country. Thomas Jefferson, for example, continued to argue that the US was not prepared for such a war. What was the army and navy like in this period? If Britain had been able to focus only on fighting the US (and not on a more important enemy in France), could the US have succeeded in this war?