The Iraq War 2003: Causes and Invasion

The Iraq War, launched on 20 March 2003, was one of the most controversial conflicts of the early twenty-first century. The USA and Britain argued that Saddam Hussein possessed Weapons of Mass Destruction and posed a threat to international security. Critics argued that the war was illegal and based on flawed intelligence. This lesson examines the causes of the war and the invasion itself.

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Causes of the Iraq War

The WMD Argument

The central justification for the war was the claim that Iraq possessed Weapons of Mass Destruction (WMD) — chemical, biological, and possibly nuclear weapons.

Claim	Detail
US and UK intelligence	Both governments claimed Iraq had active WMD programmes
"45 minutes" claim	The UK government's "September Dossier" (2002) claimed Iraq could deploy WMD within 45 minutes
Aluminium tubes	The USA claimed Iraq was buying aluminium tubes for uranium enrichment (later disputed)
Mobile labs	Claims of mobile biological weapons laboratories (based on unreliable intelligence)
Unaccounted-for weapons	UNSCOM had been unable to verify the destruction of all chemical and biological agents

Colin Powell at the UN (February 2003)

On 5 February 2003, US Secretary of State Colin Powell presented the case for war at the UN Security Council, using satellite photographs, intercepted communications, and intelligence reports.

Powell later described his UN presentation as a "blot" on his career, acknowledging that much of the intelligence was wrong.

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Other Factors

Factor	Explanation
9/11 and the Bush Doctrine	The War on Terror created a climate in which pre-emptive action was seen as justified
Regime change	US policy since 1998 (Iraq Liberation Act); neoconservatives in the Bush administration pushed for Saddam's removal
Links to terrorism	The USA alleged (without strong evidence) that Iraq had links to al-Qaeda
Human rights	Saddam's record of brutality — gassing Kurds at Halabja (1988), suppressing uprisings — was cited
Oil	Critics argued that control of Iraq's vast oil reserves was a significant motivation (denied by the USA and UK)
Unfinished business	Some saw the 2003 war as completing what was left undone in 1991

Exam Tip: For an exam question on the causes of the Iraq War, you need to evaluate multiple factors and reach a judgement about which was most important. The strongest answers will consider the interplay between WMD claims, 9/11, neoconservative ideology, and oil.

flowchart TD
  A[Causes of Iraq War 2003] --> B[WMD claims]
  A --> C[9/11 and Bush Doctrine]
  A --> D[Regime change ideology]
  A --> E[Oil and strategic interests]
  B --> B1[September Dossier 2002]
  B --> B2[Powell at UN Feb 2003]
  C --> C1[Pre-emptive war doctrine]
  D --> D1[Iraq Liberation Act 1998]
  D --> D2[Neoconservatives in Bush admin]
  B1 --> F[UNSC Resolution 1441 Nov 2002]
  F --> G[Hans Blix inspections find no WMD]
  G --> H[No second UN resolution]
  H --> I[Operation Iraqi Freedom 20 March 2003]

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The Failure of Diplomacy

The USA and Britain tried to secure a second UN resolution explicitly authorising force against Iraq, but they failed.

Country	Position
USA	Determined to act with or without UN approval
UK	Tony Blair wanted UN backing; struggled to convince Parliament and the public
France	President Jacques Chirac threatened to veto any resolution authorising force
Germany	Opposed the war
Russia	Opposed the war
Weapons inspectors	Hans Blix (head of UNMOVIC) reported that Iraq was cooperating more but needed more time

The failure to secure a second resolution meant that many countries — and many legal experts — considered the war illegal under international law.

Key Figure: Hans Blix — the head of UNMOVIC (the successor to UNSCOM). Blix told the UN Security Council that his inspectors had found no WMD and needed more time. The USA and Britain went ahead regardless.

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Domestic Opposition

The decision to go to war was deeply controversial, particularly in Britain.

Opposition	Detail
Largest protest in British history	On 15 February 2003, approximately 1 million people marched in London against the war
Global protests	An estimated 6–10 million people protested worldwide on the same day
Parliamentary debate	Tony Blair narrowly won a parliamentary vote on 18 March 2003; 139 Labour MPs voted against their own government
Robin Cook	The Leader of the House of Commons resigned from the Cabinet over the war, delivering a powerful resignation speech
US opposition	Smaller but significant anti-war movement in the USA

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The Invasion: Operation Iraqi Freedom (20 March 2003)

The Coalition

The "Coalition of the Willing" was much smaller than the 1991 Gulf War coalition.

Key Members	Troops
United States	~148,000
United Kingdom	~45,000
Australia	~2,000
Poland	~194
Other nations	Small contributions from ~40 countries

The Military Campaign

Phase	Date	Events
"Shock and Awe"	20–21 March 2003	Massive bombing campaign against Baghdad — intended to destroy Iraqi command and control and break the regime's will
Ground invasion	20 March 2003	Coalition forces advance from Kuwait into southern Iraq
Nasiriyah	23 March 2003	Fierce fighting; first significant coalition casualties
Fall of Baghdad	9 April 2003	US forces enter Baghdad; Saddam's statue pulled down in Firdos Square (a staged event for TV cameras)
"Mission Accomplished"	1 May 2003	President Bush declares major combat operations over on the aircraft carrier USS Abraham Lincoln

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The Toppling of Saddam's Statue

The image of Saddam's statue being pulled down in Firdos Square, Baghdad, on 9 April 2003, became one of the defining images of the war. However, it later emerged that the event was partly staged — the square was largely empty, and the crowd was much smaller than TV coverage suggested.

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Key Dates

Date	Event
September 2002	UK publishes the "September Dossier" on Iraqi WMD
5 February 2003	Colin Powell presents the case for war at the UN
15 February 2003	Largest anti-war protests in history
18 March 2003	UK Parliament votes for war
20 March 2003	Operation Iraqi Freedom begins
9 April 2003	Baghdad falls; Saddam's statue toppled
1 May 2003	Bush declares "Mission Accomplished"

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Extended Worked Paragraph: Q7 Importance Question

Question: "Weapons of Mass Destruction were the most important reason for the Iraq War of 2003." How far do you agree? (12 marks, AO1 + AO2)