In 2023 the Committee for Tactical Emergency Casualty Care (C-TECC) issued updated Pediatric Tactical Emergency Casualty Care (TECC) Guidelines (Guidelines) that focus on the delivery of stabilizing care of children who are the victims of high-threat incidents such as an active shooter event. The Guidelines provide evidence-based and best practice recommendations to those individuals and departments that specifically provide operational medical support to law enforcement agencies caring for children in this uniquely dangerous environment where traditional resources may not be available. This article highlights key takeaway points from the Guidelines, including several updates since the first version was released in 2013.The evidence base for the care of children in this environment is lacking, and medical care delivered in the high-threat environment is inconsistent and often not optimized for the care of infants and children. The Guidelines are supported from the existing literature base where possible, and where it is not, by consensus as to the current best practices as determined by iterative deliberations among the diverse and experienced group of stakeholders who are members of C-TECC. The Guidelines provide patient assessment and management information specific to the care of children in the following 3 dynamic phases of the high-threat environment: Direct Threat, Indirect Threat, and Evacuation. The phases represent a continuum of risk to the patient and the responder ranging from extreme (such as ongoing gunfire) to minimal (during movement toward definitive medical care).The high-threat environment is dynamic and there is competing safety, tactical/operational, and patient care priorities for responders when infants and children are injured. The Guidelines provide recommendations on the type of medical and psychological care that should be considered under each phase of threat and establishes the context for how and why to deliver (or potentially defer) certain interventions under some circumstances in order the maximize the opportunity for a good outcome for an injured pediatric patient. The Guidelines also emphasize the importance of synergizing hospital-based pediatric trauma care with those law enforcement and fire/emergency medical services that may provide field care to children under high-threat circumstances.