Which of these American wars were justified?

[Pink Panther]

I voted for these wars:
    *War of Independence-I feel the British stepped out of their lines on certain issues, though you can make an argument that the Americans were acting like spoiled children.
     *War of 1812-I'm going to be honest, I only voted for this option because it somewhat helped Napoleon and his war with the British, although it didn't matter in the end. I guess we gained the respect of the British, although we starting to get respected before the war.
     *Civil War(Union Side)-I believe this is obvious, but it also completely united the country, as people starting thinking of themselves as Americans, rather than Alabamians or Vermonters.
     *WW1-Although I wish the Germans didn't lose, considering they tried to convince Mexico to invade us, that's more than enough justification, honestly.
     *WW2-I believe this is also obvious.

      Honorable Mention:
       *Spanish-American War-Although this wasn't at all justified, it essentially marked the end of one of the most evil empires in human history.