"The purpose of this study was to furnish infantry, artillery, armor, and combat engineer research information for use in selecting new combat arms aptitude areas based upon the validity of ACB [Army Classification Battery] tests and a group of experimental predictors. Testing was accomplished in the 10th Infantry Division at the start of the training cycle for 1642 enlisted men later trained in combat arms military occupational specialties. Criterion ratings of estimated combat potential were collected after overseas maneuvers, one year after testing"--Preliminary page.