# Multi-Domain Operational Environment **Entity class:** Distributed test and training ecosystem **Aliases:** MDOE ## Definition The **Multi-Domain Operational Environment (MDOE)** is a federated live-virtual-constructive ecosystem for Army experimentation, testing, and training. Public CPE ST3 material describes it as combining simulation, instrumentation, exercise control, and AI/ML-enabled capabilities across domains. ## Relationships - **exercise-control interface:** [[wiki/eXpeditionary Live-Virtual-Constructive Command Center|XLCC]]. - **federated programs:** Threat Battle Command Force and [[wiki/Intelligence Electronic Warfare Tactical Proficiency Trainer|IEWTPT]]. - **architecture:** [[wiki/Live-Virtual-Constructive Integrating Architecture|LVC integration]]. - **producer-function role:** manages events, instrumentation, participant perception, and after-action data. ## Sources / Provenance - [CPE ST3 — MDOE](https://www.cpest3.army.mil/Project-Offices/PL-TSMO/IMO/MDOE/)