This project is part of the main project ”Dansk hjemvendte soldier” Danish Returning Soldiers. The project uses the same database including 26.000 soldiers deployed in the period 1992-2009. The objective of the project is to describe soldiers’ drugs use and diseases/diagnosis after being deployed. The project investigate which health consequences a military deployment can have for soldiers’ mental health. Moreover, the project investigates the non-response rate from the surveys managed by the Danish military psychologists six months after deployment. The project investigates whether or not non-response could be related to the soldiers’ psychological situation after missions.