While trying to fall asleep one night a thought occurred to me about America's war history. Everytime we have fought a war on flimsy grounds (false information, prodding of war hawks, prodding of media, divine right, etc...) the war has gone badly and the end result was that the USA undergoes a shift on both the public and government levels. Most of the time these things sort themselves out for the better but the result is the same. The USA that started the war is completely different from the USA that ends the war.
The three wars that stand out most to me are:
1. War of 1812
2. Vietnam War
3. Iraq War 2003
What if the USA manages to avoid all three of these wars?
I have posted this previously and no one came up with a real answer. Is a United States that avoids these three wars radically different from OTL?