International Law and the U.S. Invasion of Iraq (2003)

Introduction: The Legal Debate Over the Iraq Invasion

The invasion of Iraq by the United States prompted a wide-ranging debate about the use of military force without explicit approval from the United Nations. Whether this show of force was truly legal and legitimate became a question considered by many individuals and governments. Some argued that there was implied authorization because a resolution created during the Gulf War continued to authorize any force necessary to ensure Iraq's compliance with the cease-fire established at that time. The United States government also argued that Iraq posed an imminent threat to many countries and to international security and peace, and that the United States was therefore entitled to act in preemptive self-defense.

It is important to examine these claims carefully on a legal basis and to explore the background of the war in Iraq. Others argue against any legal right of the United States to initiate this war, basing their position on assessments and statements made by members of the Security Council and on the view that Gulf War-era resolutions were never intended to authorize subsequent uses of force against Iraq. A further resolution passed in November 2002 is also said to have provided no implied authorization for the use of force. The self-defense argument is similarly contested: extensive testimony and reporting have confirmed that no weapons of mass destruction were located within Iraq, undermining one of the central justifications offered by the coalition.

Those who oppose the war as a matter of international law contend that the justifications advanced stretch legal principles so far that the principles themselves are effectively undermined. Operation Iraqi Freedom began on 20 March 2003, when the United States, Australia, and the United Kingdom launched missile attacks on Baghdad aimed at removing the Iraqi leadership. After approximately three weeks of operations, American troops took control of Baghdad within two days. On 2 May 2003, President Bush announced that the coalition had achieved victory in Iraq.

According to Bush, however, the battle in Iraq was only a small victory in the broader war on terrorism that had allegedly begun with the terrorist attacks of 11 September 2001. The coalition believed it was necessary to eliminate the threat that Iraq posed to the United States and its allies. Coalition leaders also stated that the lives of many Iraqis would be improved, that humanitarian assistance could be delivered more easily, and that Iraqis could establish a peaceful, democratic state in which they determined their own futures — free from an authoritarian leader such as Saddam Hussein.

Authoritative sources have suggested that between 7,000 and 9,000 Iraqi civilians were killed by coalition forces, and it is considered quite likely that the actual number was considerably higher. Greenpeace and other peace-promoting organizations have argued that the United States threatened the framework of international law by refusing to accept it as it stood and instead seeking to reinterpret it so that its preferred actions would appear lawful.

Legal challenges are therefore present on both sides of the debate over the invasion. Some believe that international legal rules exist precisely to prevent states from acting in ways that cannot be readily justified. The invasion suggests to many observers that the United States viewed international law as a purely instrumental device for validating its own actions — that international law can be interpreted and explained in ways that uphold almost any course of action a nation wishes to take.

Investigating these claims is vital because the debate over whether the Iraq war was legal under international law remains significant. It appears that most of the arguments put forward by Australia, the United Kingdom, and the United States lack strong legal footing. Rather than demonstrating that international law is infinitely malleable, however, this paper seeks to show that international law constitutes a powerful framework that enables meaningful debate among nations about whether particular actions were legitimate. The United States and its coalition partners apparently manipulated international law to some degree for strategic benefit, making arguments that were generally not accepted by most of the international community.

This is significant because the principles governing international law were stretched so far by the United States and its justifications for war that they risk losing their meaning altogether. The war was allegedly authorized by the UN Security Council, but this interpretation stretches the meaning of many prior Security Council resolutions and obscures the Council's actual intent. Claiming self-defense also stretches that concept far enough to make aggression and self-defense appear indistinguishable. International law lacks the punitive mechanisms of domestic law, but the inability to legally justify the war should nonetheless diminish the legitimacy of the campaign itself, and those who instigated it should bear the corresponding costs.

The UN Charter Framework on the Use of Force

Determining whether the invasion of Iraq was legal is essential for evaluating not only the legitimacy of the war itself but also the future impact of such actions on the international community. International law is broadly framed by the UN Charter, though it is not limited to what the Charter says. One key provision dealing with the use of force states that nations should refrain from using force or the threat of force against the political independence or territorial integrity of other nations. This prohibition was intended to be interpreted broadly and applied in a general sense.

The UN Charter recognizes two exceptions to this prohibition. First, measures authorized by the Security Council are binding on all member states, and the Security Council is permitted to authorize military force when necessary to restore or protect international security and peace. Second, all nations retain the right to use force in self-defense. The law governing recourse to force in the international community is highly complex, but the general consensus among nations is that the basic rules contained in the UN Charter reflect customary international law.

In general, most nations agree on the applicable law and its basic content. Disagreements tend to arise when applying this law to specific facts or circumstances. These basic rules are central to the debate over the legality of the United States' use of force in Iraq, because the United States relied primarily on the two exceptions described above. Critics argue that the coalition disregarded established principles, while supporters maintain that the United States did not in fact disregard any international legal principles or attempt to rewrite the rules — rather, it interpreted the law's application based on the facts as it understood them and concluded that it had the right to invade.