Cognitive Processing Therapy is one of the most effective evidence-based treatments for PTSD, endorsed by the VA, the Department of Defense, and every major clinical practice guideline. Thousands of clinicians deliver CPT in group format every week across VA residential programmes, military treatment facilities, community mental health centres, and intensive outpatient programmes. Yet until now, no standalone manual has provided the session-by-session group protocols, facilitation scripts, and reproducible worksheets that group CPT facilitators actually need. Session-by-Session Group Protocols with Minute-by-Minute Guides This manual walks facilitators through all twelve CPT group sessions with detailed time allocations, co-facilitation role assignments, sample facilitator dialogue, and group-specific adaptations for every session component. Each session chapter includes a minute-by-minute protocol table showing exactly what the primary and secondary facilitators should focus on during each segment of the 90-minute session. Frameworks Built for Group Delivery Group CPT demands skills that individual CPT training does not cover. This manual introduces practical frameworks designed specifically for the group format, including systematic approaches for evaluating competing stuck points in real time, structured co-facilitation coordination, protocols for managing emotional activation cascades across multiple members, and step-by-step methods for challenging self-blame through peer Socratic questioning. Reproducible Worksheets Adapted for Groups Every core CPT worksheet has been adapted for group delivery with added peer review sections, group discussion prompts, and facilitator coaching instructions. The complete collection includes group-adapted versions of the Impact Statement, Stuck Point Log, ABC Worksheet, Challenging Questions Worksheet, Patterns of Problematic Thinking Worksheet, and Challenging Beliefs Worksheet, plus all five thematic module handouts, group agreements templates, symptom tracking sheets, co-facilitator debrief forms, fidelity monitoring tools, and post-group self-monitoring plans. Population Adaptations and Delivery Formats Dedicated chapters address group CPT adaptations for military and veteran populations, sexual assault survivors, first responders, culturally diverse populations, and complex trauma with comorbidities. Additional chapters cover intensive and massed delivery for IOP, PHP, and residential programmes, telehealth group delivery, and supervision, training, and fidelity monitoring. Grounded in the Research Built on the STRONG STAR Consortium clinical trials, VA implementation research, and CPT Training Institute dissemination standards, this manual translates the evidence base into actionable clinical protocols. It complements the Resick, Monson, and Chard therapist manual by providing the group-specific depth that facilitators have been requesting for years.