of PTSD which were not sufficient to make a PTSD diagnosis under the DSM - IV . In June 2012 , the Veteran submitted a statement explaining that he had received continuous PTSD diagnoses for the past 10 to 12 years , and he continued to suffer from the disease . The Board begins by noting that due to the Veteran ' s combat service in Vietnam , the RO conceded the existence of in - service stressors . Thus , a discussion concerning stressors is unnecessary . The Board finds that the evidence supports the Veteran ' s claim of service connection for PTSD . First , the record demonstrates the Veteran served in Vietnam , and the RO conceded that the Veteran ' s in -