Yes. Combat is only one of five special provisions in 38 C.F.R. § 3.304(f); there are also relaxed evidentiary paths for PTSD diagnosed in service, for stressors related to fear of hostile military or terrorist activity, for prisoner-of-war experience, and for in-service personal assault. Where none of the five applies, the general rule still does: the stressor must be supported by credible evidence, which can come from service and personnel records, unit records, incident reports, or statements from those who served alongside you. Training accidents, vehicle and aircraft incidents, disasters, handling human remains, and medical trauma all support valid claims when the record is developed.