In this book ten scholars present the history of these operations, carried out in all parts of the world. Although a number of earlier operations-especially Schleswig 1848 and Saar 1934-1935-are described, the emphasis in the book is on the post-1945 era. The reader can follow different UN missions in Congo, on Cyprus, in the Middle East until the present UN involvement in former Yugoslavia- obstacles and failures as well as successes. Special focus is given to the development from peace-keeping to peace-enforcement in the post-1989 world. Thus this book gives an introduction to the history of international peace-keeping throughout the last two centuries in general, as well as to the Swedish participation in these operations in specific.