FORT HUACHUCA, Ariz. — Imagine the clock displaying 3 a.m. in the year 2040 at a forward power projection platform in a highly contested Indo-Pacific theater. Sensors detect an adversary’s hypersonic missile targeting the installation’s primary munitions depot. Simultaneously, the installation's cybersecurity architecture detects malicious traffic targeting the power grid. Instantly, the cybersecurity architecture isolates substations and reroutes power through redundant pathways to keep defensive missile launchers fully energized. As the threat approaches, an integrated air and missile defense system driven by artificial intelligence calculates the optimal intercept. The missile interceptor succeeds. Within seconds, the automated logistics system of the Army's Organic Industrial Base assesses the expended inventory and initiates a 3D printing process to fabricate a replacement guidance component for a new missile interceptor. This imaginary scenario illustrates a future where an Army installation is not just a passive piece of real estate. Instead, the installation is a fully realized, intelligent weapon system platform known as a “sentient fortress.” Achieving this vision is the driving force behind the Army's 15-year OIB Modernization Strategy and Modernization Implementation Plan. As part of the Communications-Electronics Command, the U.S. Army Information Systems Engineering Command is dedicated to realizing the Army’s OIB Transformation to ensure a 21st-century OIB capable of sustaining readiness, supporting modernization efforts and remaining postured to meet wartime requirements. The vulnerability of a bygone era To appreciate the resilient installation of the future, one must understand the critical vulnerabilities of legacy infrastructure. For decades, Army installations relied on a fractured technological foundation with a complex seam between information technology and operational technology. IT encompassed data and enterprise networks, while OT referred to the physical world, including industrial control systems, power grids, and the complex machinery of the OIB. The critical nature of these systems has made the seamless convergence of the