of these contradictory findings , and having reviewed the record , the Board concludes that there is not clear and unmistakable evidence that a psychiatric disorder existed prior to service entrance . Thus , the Veteran is presumed to have been in sound condition when entering service as to a psychiatric disorder . Service records tend to show that at least psychiatric symptoms manifested during service . Following his deployment to Vietnam in September 1968 , he was accompanied by a recommendation for limited duty and deployment only to a location where psychiatric outpatient treatment was available . In November 1968 , he was noted to be more reclusive , more depressed , and getting worse . After service , a December 1992 VA examination report reflecting a