> Honestly I'm not sure why we started this war.

If you watched the film City of God, there's a voice over contemplating murder as the crew robs banks : the first time, the rule is the exception... the second time, he learned there's an exception to every rule... the third time, the exception is the rule.

The United States has gone to war so many times without (or with a faulty) casus belli that it no longer needed one, that's why "we" started this war.