# Azure Stack Hub **Entity class:** On-premises and disconnected cloud platform **Architecture:** [[wiki/Signals, Silos, and Sovereign Software|Signals, Silos, and Sovereign Software]] ## Definition **Azure Stack Hub** brings a subset of Azure services into customer-controlled facilities and can operate in connected or disconnected configurations. ## Modern Defense and Cybersecurity Role Disconnected deployment makes the platform relevant to classified facilities, tactical locations, ships, and other environments where mission systems cannot depend on continuous public-cloud connectivity. Microsoft describes the disconnected pattern as a submarine scenario. ## Chronological Proximity Azure Stack became generally available in 2017 and later formed part of Microsoft's broader hybrid and tactical-edge cloud architecture alongside [[wiki/Azure Arc|Azure Arc]]. ## Relational Proximity Stack Hub supplies local compute; Arc can govern distributed environments; [[wiki/Azure Government|Azure Government]] supplies accredited hyperscale services where connectivity and classification permit. ## Collection Routes [[collections/The Civilian Intelligence Marketplace|The Civilian Intelligence Marketplace]] · [[collections/Terrorism, Counterterrorism, and the Intelligence Environment|Terrorism, Counterterrorism, and the Intelligence Environment]] ## Sources / Provenance - [Primary documentation](https://learn.microsoft.com/en-us/azure-stack/operator/azure-stack-disconnected-deployment)