The Charter forbids use of force. Participating in armed conflict is illegal in all but 2 situations: self-defense and when authorized by UN Security Council. The alibi for the invasion given by George W. Bush and senior members of his administration was their assertion that Suddam Hussein (Iraqi leader) was actively funding and sheltering Al-qaeda. They also claimed that Suddam Hussein had weapons of mass destruction at his disposal that he was prepared to use on US. A careful review and analysis by the bipartition 9/11 commissions concluded both the allegations false. This makes the invasion illegal since the UN Charter does not allow a nation to attack another preemptively.
Bush administration also attempted but failed to convince the UN Security Council. If the Security Council had authorized the invasion only then it would have been considered legitimate. Kofi Annan (UN Secretary – General 1997-2007) said, “I have indicated the invasion was not in conformity with the UN Charter... From the Charter points of view it was illegal.”
The British International Intelligence states, “...the intelligence and facts were being fixed around the policy (to invade Iraq).” These steps were taken by the US in order to have conformed to their desires. The US government had decided to overthrow Suddam Hussein’s government before the attacks on 9/11 with the primary objective to gain access and control Iraq’s vast oil fields for economic