Well, technically the Civil War had to be a first strike by us... :dunnoNot one on your list was a first strike by us. They were all conflicts or wars that we got involved with in our own best interest. As a super power we need to help keep global stability...
But I would really like to see 1 example in recent history where the US was the aggressors... you won't find one, because it is against international law. It is a crime.
Seriously though, it could be argued (effectively imo) that an efficient, pro-US democracy in the Middle East is in our best interests.
As you know, I do understand the other side that says we have no business being over there. But I can also see how, in the long run, looking at it unemotionally, it could be very beneficial to us.