report and the December 1992 VA examination report conclude that the most traumatic circumstance of the Veteran ' s Vietnam service was related to the Veteran not being permitted to carry a gun due to his psychiatric disorder . The private report states that the Veteran felt terrified and feared for his life the entire time he was serving in Vietnam . The physician noted that PTSD is most severe in individuals such as the Veteran who have an underlying psychiatric disorder such as GAD . Based on this new July 2011 private treatment report , in conjunction with the other evidence of record , the Board finds that the evidence is at least in equipoise as to whether the Veteran has PTSD and generalized anxiety disorder related