The Iraq War, a conflict that defined a generation and reshaped the Middle East, began with a decisive invasion in March 2003. What started the Iraq war was a complex interplay of immediate security fears, long-standing geopolitical tensions, and a specific political decision to dismantle the regime of Saddam Hussein. While the official justification centered on eliminating weapons of mass destruction and ending a brutal dictatorship, the roots of the conflict extend deep into regional history, intelligence assessments, and the broader context of the War on Terror.
The Context of Regime Change
To understand what started the Iraq war, one must first look at the policy objectives of the United States and its allies in the years leading up to 2003. Since the conclusion of the Gulf War in 1991, the stated goal of the Clinton administration had been the "regime change" in Iraq. United Nations Security Council Resolution 687, which ended the Gulf War, required Iraq to destroy its weapons of mass destruction. The subsequent decade of sanctions and inspections was framed by the international community as an effort to ensure Saddam Hussein complied with this mandate, a task he consistently obstructed. This long-standing friction provided the foundational political will for military action when a new administration took office in 2001.
The Post-9/11 Security Paradigm
The most immediate catalyst for the invasion was the global security environment following the September 11 attacks. The terrorist acts of 2001 fundamentally altered American foreign policy, introducing the doctrine of preemption. The Bush administration, influenced by neoconservative thinkers, argued that waiting for a threat to materialize was no longer viable in a world where rogue states might collaborate with non-state actors. What started the Iraq war in this context was the administration's assertion that Saddam Hussein’s regime could provide sanctuary or weapons to terrorist organizations. The conflation of the secular Ba'athist government with the ideology of Al-Qaeda created a powerful political narrative that justified drastic military action, despite the lack of direct evidence linking Iraq to the 9/11 attacks.
The Intelligence on Weapons of Mass Destruction
Central to the public justification for the war was the claim that Iraq possessed active weapons of mass destruction (WMD). Intelligence agencies from the United States, the United Kingdom, and other allies reported that Saddam Hussein was reconstituting his nuclear program and maintaining stockpiles of chemical and biological weapons. This intelligence formed the core of the argument that the dictator posed an imminent threat to regional stability and global security. However, a critical examination of what started the Iraq war reveals that this intelligence was deeply flawed. Many of the documents cited were forgeries, and human intelligence sources were unreliable. The failure to find WMDs after the invasion became one of the most significant controversies surrounding the conflict, severely damaging the credibility of the governments that led the charge.
The Invasion and Collapse of the Iraqi State
The military campaign began on March 20, 2003, with a "shock and awe" bombing campaign followed by a ground invasion. The initial phase of what started the Iraq war was remarkably swift, with conventional forces overwhelming the Iraqi military. On April 9, 2003, Baghdad fell, and the statue of Saddam Hussein was toppled in Firdos Square, symbolizing the collapse of the old regime. The speed of the victory, however, revealed a critical miscalculation regarding the post-conflict environment. The decision to disband the Iraqi army and exclude the Ba'ath party from public life created a power vacuum and left hundreds of thousands of soldiers unemployed. This instability became the breeding ground for the insurgency that would define the next several years of violence.
The Insurgency and Sectarian Conflict
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