Illegal...And They Knew it.
We have the Downing Street Minutes and their associated documents.
We have revelations of a bombing campaign called 'Southern Focus' began in June of 2002, which involved over 21,000 sorties against targets in Iraq. Please note this began while the administration was denying the inevitability of war, and some five months before the Administration asked Congress for the authority to begin military operations in Iraq.
And we have this forgotten story...War critics astonished as US hawk admits invasion was illegal
In November of 2003, Richard Perle, one of the architects of Bush Administration policy towards Iraq, stated of the invasion of Iraq:
I think in this case international law stood in the way of doing the right thing.
Richard Perle admitted the invasion of Iraq was illegal. At the urging of George W. Bush and members of his cabinet, America embarked on a war of aggression in violation of US and international law. They are thus liable for proscecution under that law. It is time we did so.