Attrition is a serious and costly problem for many Armed Forces. The attrition rate in the Swedish Armed Forces basic military training 2014 was 16 percent. The main reasons given for dropping out were health/ injury related but also reasons related to changed career ambitions, such as starting another line of work or studies. The aim of our project that we will present is to gain a deeper understanding about the recruits who choose to leave compared to those who remain during basic military training. Another goal is to plan a long-term systematic follow-up with the possibility to develop requirements, assessments, selection criteria and training by evaluating the predictive power of the selection. The project includes a psychological follow-up of the drop outs, and will later also include physiological and medical follow-ups. The project is a collaboration between the Swedish Armed Forces including the Internal Occupational Health Care Center and Human Resources, the Swedish Defence Recruitment Agency and the Swedish Defence University. In the presentation the project will be illustrated from different perspectives. Aim, practical implementation and results of the qualitative and quantitative data collections will also be presented.