Actually there is grey area out the ass for that one.So ? Since the inception of the "Völkerbund" it is clear that all these wars were unjust.
The leadership of the 3rd Reich was convicted for crimes against peace, which consisted of a resources grab (aka land grab or invasion of poland and a butt load of other countries).
Check out the principles of the Nuremberg trials
Sure ? Even if this was correct your POV is problematic.
According to the constitution treaties signed and ratified by president and congress become "supreme law of the land". The UN charter delcaring wars of agression to be illegal was ratified in 1945.
As an result under american law any order pertaining to the invasion of iraq was unjust and illegal. The only defense a soldier partiscipating in the invasion can bring forward against the charge "commiting crimes against the peace" is "hindsight is 20/20" as well as "I was just following orders".
BtW the Veterans for peace are with me in this.
In short the President of the United states, the members of congress as well as any soldiers partiscipating in the invasion are criminals.
1. The US and Iraq were still under a cease fire agreement for the 91 Gulf War. A technical 'state of war' still exsisted under a ceasefire.
2. Iraq had breached that ceasefire too many times to count.
3. 17 UN resolutions and alot of them that declared 'serious consequences' for not complying, including the (correct me if I'm wrong) 1441.
Admittatly the UN deal is not a real good argument since all those resolutions are political double speach with as much meaning as a typical billboard.