This book examines the decisions by Tony Blair and John Howard to take their nations into the 2003 Iraq War, and the questions these decisions raise about democratic governance. It also explores the significance of the US alliance in UK and Australian decision-making, and the process for taking a nation to war. Relying on primary government documents and interviews, and bringing together various strands of literature that have so far been discussed in isolation (including historical accounts, party politics, prime ministerial leadership and intelligence studies), the authors provide a comprehensive and original view on the various post-war inquiries conducted in the UK, Australia.