The Yale Center for Traumatic Stress and Recovery (YCTSR) will provide national expertise and training on trauma-focused and acute/early/brief interventions, including supporting adoption and adaptation of early evidence-based treatments (EBT) to collaboratively overcome challenges to advance delivery. YCTSR will: (1) Provide training and technical assistance for national dissemination and implementation of EBT and service approaches including the Child and Family Traumatic Stress Intervention (CFTSI) and CFTSI Treatment Applications, Child Parent Psychotherapy (CPP), and Fathers for Change. CFTSI is currently the only evidence-based brief, early mental health treatment designed specifically for children 7-18 who have been impacted by a recent traumatic event or recently disclosed abuse. This will be expanded to young children (ages 3-6), children in foster care, children in hospital settings, organizations serving tribal and rural communities, and military families; (2) Serve as a resource for training and consultation focused on acute, brief approaches and EBTs in response to mass casualty events and disasters, as well as training and consulting on Trauma-Informed Policing approaches specifically designed to build officers' skills in early identification and trauma-informed response to children and families; (3) Expand implementation of early trauma interventions to new populations and service systems through five national Learning Communities (LC) focused on implementation of CFTSI with young children, children in hospital settings, Child Advocacy Centers, organizations serving rural and tribal communities, and those serving military families.