This is simply the best single analysis of the variables that comprise unit cohesion in battle. No platoon sergeant, platoon commander or anyone senior in the ranks of the Army and Marine combat arms should neglect to read this book. Published 35 years ago, it draws upon decades of research and personal observations of grunts on the front lines. Written by a Canadian military analyst, every chapter includes careful scholarship and commonsense. No finer single book can be found on the subject of small unit motivation when blood is pouring out and you want to quit or pull back.