This United States Marine Corps USMC manual, Marine Corps Reference Publication MCRP 7-20B.1 (Formerly MCRP 8-10B.1) Operational Training Ranges Required Capabilities October 2021, is the source document for managers and operators of Marine Corps range complexes as well as Marine air-ground task force (MAGTF) commanders and staffs, joint forces, and other Services describing required capabilities for the entire Marine Corps range infrastructure. This publication categorizes and quantifies the required capabilities of Marine Corps operational training ranges. It also provides an overarching strategy for the ranges to ensure that range assets and capabilities are continuously available to support operations and training requirements-especially critical as the Marine Corps implements significant transitions in weapons, technology, and doctrine. 7-20B.1 recognizes the dynamic environment of today's Marine Corps and the one certainty in training and education: that such training must be a continuum which must evolve as needed to produce Marines who are capable of thriving in diverse and challenging operational environments. The infrastructure involved in this training must keep pace with operating force mission requirements and force modernization. This publication supports mission-essential training in an unconstrained environment. It identifies short-term and long-range investment requirements and supports the development of new operational training ranges. 7-20B.1 focuses on enhancing the effectiveness of operational training range support provided to warfighters and the stewardship of these vital resources for future generations of Marines.