The Army's New Unit Personnel Replacement and Its Relationship to Unit Cohesion and Social Support

A recent concern of the U.S. Army's top leadership has been the deterioration of morale and cohesion in combat arms units. High personnel turnover in U.S. Army units has been viewed as a primary factor contributing to decreased unit cohesiveness. The current and traditional U.S. Army Indi- vidual Replacement (IR) System trained, assigned, and deployed soldiers to units as individuals. As a result, IR units have had as much as 45% personnel turnover annually. The new Unit Replacement (UR) System trained, assigned, and deployed soldiers as intact groups for the entire first-term soldier's enlistment. The objective of the study was to examine the effects of unit replacement on cohesion and to elaborate on the function of cohesion by examining the relationship between cohesion and social support in a sample of 3,245 soldiers in 43 line companies matched by type of replacement, type of combat arms, and stateside/overseas deployment. Soldiers in UR units in which soldiers had previously undergone Basic and Advanced Individual Training together or had their personnel stabilized reported a significantly higher level of cohesion than did soldiers in IR units. This difference persisted even when personal and unit characteristics were held constant in compari- sons. In terms of social support, UR soldiers cited more support providers in their units than did IR soldiers. Perceived satisfaction with social support and perceived helpfulness of social support provided by unit members were significantly and positively correlated with the cohesion measures, irrespective of the type of replacement. Whereas reciprocity was significantly and positively related to cohesion in commonly trained UR and IR units, it was nonsignificantly related to cohesion in personnel-stabilized UR units. Impli- cations of results for the expected effects of cohesion on the quality of interpersonal relations among unit members are discussed.