Combat-related Post-Traumatic Stress Disorder (PTSD) continues to pose a significant challenge to the mental health of military veterans, with long-term psychological and functional impairments. This study examined the effectiveness of Mindfulness-Based Cognitive Therapy (MBCT) in promoting sustained recovery among individuals with combat-related PTSD. A total of 60 participants were enrolled and followed for six months post-intervention. PTSD symptom severity was measured using the Clinician-Administered PTSD Scale (CAPS-5), alongside assessments of mindfulness and emotional regulation. The results indicated a statistically significant reduction in PTSD symptoms immediately post-treatment, with these improvements largely maintained at the six-month follow-up. Participants also demonstrated marked increases in mindfulness and emotional regulation capacities. The findings suggest that MBCT not only contributes to immediate symptom relief but also supports long-term psychological resilience and relapse prevention in veterans. These outcomes underscore the potential of MBCT as a sustainable, non-pharmacological intervention for combat-related PTSD.