Therefore, it is as well to say now that from all of the careful searching made by the armed services as to the fighting characteristics of Americans during World War II, not a great deal was learned in addition to what was already well known, or surmised. The criteria that had been used in the prior system of selection proved to be substantially correct; at least, if it had faults, they were innate in the complex problem of weighing human material, and were beyond correction by any rule of thumb or judgment. Men were chosen to lead because of personality, intelligence at their work, response to orders, ability to lead in fatigues or in the social affairs of organization, and disciplinary record. In combat these same men carried 95 percent of the load of responsibility and provided the dynamic for the attack. But in every unit, there was almost invariably a small sprinkling of individuals, who having shown no prior ability when measured by the customary yardsticks of courtesy, discipline and work, became strong and vital in any situation calling for heroic action. They could fight, they could lead, they knew what should be done, they could persuade other men to rally around, and by these things, they could command instantly the previously withheld respect of their superiors. Neither the scientific nor the military mind has yet been able to provide the answer as to how men of this type--so indispensable to the fighting establishment in the thing that matters most, though lacking in strong surface characteristics--can be detected beforehand, and conserved, instead of being wasted possibly in a labor or housekeeping organization. All concerned recognize the extreme importance of the problem, and would like to do something about it. What is as yet not even vaguely seen is the large possibility that the problem might be self-liquidating if all junior officers became more concerned with learning all they could about the private character and personal nature of their subordinates. This does not mean invading their privacy; but it implies giving every man a fair chance to open up and to talk freely, without fear of contempt. It means studying the background of a man even more carefully than one would read a map, looking for the key to command of the terrain. These are usually repressed men; many of the foreign-born are to be found among them; they cover up because of pride, but they are not afraid of physical danger. Once any man, and particularly a superior, gets through the outer shell, he may have the effect of a catalyst on what is happening inside. If such men did not have basic loyalty, they would never fight. When at last they give their loyalty to an individual, they are usually his to command and will go through hell for him.