John Dollard (1900-1980) was a psychologist and social scientist best known for his studies on race relations in America. From 1942 to 1945 he served as a consultant in the Morale Services Division the United States Department of War, during which time he and fellow psychologists at Yale University's Institute of Human Relations produced a study titled "Fear and Courage under Battle Conditions." The study investigated fear and morale of soldiers in modern combat conditions. With the active assistance of the Veterans of the Abraham Lincoln Brigade interviews with Lincoln Brigade veterans were carried out and a questionnaire distributed. Three hundred veterans who had served as volunteers with the Abraham Lincoln Brigade during the Spanish Civil War replied and became the research subjects for the study. This book presents the findings from this intensive study for the purposes of military value.