This new edition of the volume is presented on the wave of the success which had its first edition (2003). It is entirely updated to the current situation of the disciplines covered, and expanded with particular regard to the new missions, that have become the main challenge for the armed forces in these first decades of the new millennium, with new insights to technological development toward so-called cyborg warriors, new forms of leadership and changes in soldier's identity and organisational culture. It is compiled of documents coming from various researchers at universities around the world as well as military officers devoted to the sector of study. Covered in this volume is a historical excursus of studies prior to contemporary research, interpretive models and theoretical approaches developed specifically for this topic, civic-military relations including issues surrounding democratic control of the armed forces, military culture, professional training, conditions and problems of minorities in the armed forces, an examination of the structural change within the military over the years including new duties and functions following the Cold War.