This is the third volume in a series of books which all look at the documents of individuals active in European politics between 1870 and 1945. This specific book looks at warfare, conflict and resistance by an examination of private papers only. The first volume of the series aims to provide an outline guide to the surviving personal papers of over 1000 individuals active in the socialist, labour, radical and revolutionary movements in Europe between 1870 and 1945. The second volume provided a similar guide to the private papers of a further 1000 individuals active in European diplomacy and international affairs over a similar chronological period. The third volume looks at the major themes of European warfare, conflict and resistance, but is concerned only with private papers. The turbulent history of Europe during the last century has meant that many papers have not been kept or have been subsequently lost through destruction in war, persecution, exile and banishment which has added to the problems of research for this book. The problem is increased by the sensitivity of much of the material for example in locating the archives of the Resistance in France or the papers of alleged collaborations. Also until Galsnost in Eastern Europe comes to fruition, archivel resources there are limited.