The percentage of "returned Army National Guard soldiers (N = 4,567 in 50 company-sized units)" who reported being unable to sleep, according to a recent article n the journal Military Psychology -- Relationships of deployment and combat experiences to postdeployment negative health conditions among Army National Guard soldiers.
Other significant problems included:
Longer deployment lengths were associated with troubled relationships and aggression toward the significant other adult and children in the household. More deployments were associated with aggression toward household children. Self-reported general combat trauma and having killed or wounded someone were associated with all problem areas.