Exercise Semper Durus 2026 was conducted aboard Marine Corps Logistics Base Barstow, California, April 20-24, marking a highly successful period of rigorous training and readiness validation for the installation. Throughout the exercise, #marines and base personnel were tested on crisis response capabilities through complex scenarios, including suspicious activity observation, Vehicle-Borne Improvised Explosive Device threat mitigation, Chemical, Biological, Radiological, and Nuclear defense, and active shooter response. Additional support and participation from Barstow Police Department , San Bernardino County Sheriff's Department , and San Bernardino County Fire significantly enhances our interoperability and ensures a unified, rapid response to any potential real-world crisis, and we thank the base and surrounding community for their continued support.