The spread of democracy to amajority of the world’s states and the legit- imization of the use of force by multilateral institutions such as NATO and the UNhave been two key developments since the Second World War. In the last decade these developments have become intertwined, as multilateral forces moved from traditional peacekeeping to peace en- forcement among warring parties. This book explores the experiences of nine countries (Canada, France, Germany, India, Japan, Norway, Russia, the United Kingdom, and the United States) in the deployment of armed forces under the UN and NATO, asking who has been and should be accountable to the citizens of these nations, and to.