You're pro-war and that's great.
ha. just kidding.....just kidding.
Iraq did not, nor was imminently about to attack the US.
Thus it was not preemptive.
The administration attacked Iraq on the theory that they might someday in the future attack the US (with presum... claimed, fabricated words of WMDs)
Going on the basis that Iraq is an illegal war, no soldier has an obligation to obey any order to fight in it. In fact might even have a legal obligation not to. Since soldiers have a legal obligation to disobey illegal orders. They are not legally obligated to "just follow orders". (I am not a lawyer, so do not listen to me. Ah, circles....
If you don't like the war in Iraq why do believe US soldiers should be there, "not make friends", and kill people who are not their/our enemy?