This report provides graphical comparisons among four Army-relevant groups as to thirteen indices of representativeness. The four groups break the 1972 high school seniors down according to whether or not they planned to enter the Army and again according to whether or not they had done so within eighteen months. The thirteen indices extend beyond such customary representation measures as race and sex to include family background, aspirations, interests, attitudes and attitude changes. These results are developed primarily from the National Longitudinal Study of the Office of Education. The quantitative displays are assessed in relation to three categories of issues about representation--political legitimacy, social equity, and military effectiveness. This assessment is the first part of a systematic analysis leading to a plan for defining and achieving representation in the Army. (Author)