As the soldier passed through these various examinations his interviewers entered upon his record card his physical and mental qualifications, his trade or profession and his degree of proficiency. Thus was tabulated, for the first time in the history of any army in any nation, the exact physical, mental and industrial ability of every soldier in the American army. These records were kept by the unit to which the soldier was assigned, and followed him if he was changed to another, for the information of the officers under whom he served. A glance at such a card gave to an officer the knowledge he should have concerning the aptitudes, the abilities and the character of any of his men whom he might wish to assign to some particular service. If skilled men were wanted in any of the scores of special occupations which the modern army demands they could quickly and easily be brought together, with the sure knowledge that they would be able to do what was expected of them. One of the greatest of the many problems facing those who had to make an army of millions of men out of raw civilians in a few months was to be sure of getting the right man for the right place, and the Committee on Classification of Personnel, an innovation in the making of armies, solved it. Similar tests helped to determine the qualifications of officers and enabled their superiors to judge their fitness for any specified duty with accuracy. The Personnel work was conducted by men chosen for it because of their aptitude and their experience in civil life and they were then trained especially for it in schools for that purpose instituted at army camps. These individual records and the service records of the entire army, both privates and officers, with the history of each unit, are to be preserved among the archives of the Government.