MAK Legion

Synthetic Environments at Unprecedented Scale

Scalability and Interoperability Framework for real time distributed simulations at unprecedented scale

MAK Legion is a scalability and interoperability framework for exchanging information, exchanging state and interactions between different simulation applications - between virtual simulators, constructive simulations, and other tools that go into a simulation system.

Introducing MAK Legion

Proven Scalability and Flexibility

3.8-million cloud-hosted entities demonstrated for the US Army Synthetic Training Environment.

Initial integrations with VR-Forces, VR-Vantage, VBS4, Unreal, Unity, OneSAF proven before launch of v1.0.

Designed for both cloud and local deployment on multiple platforms.

Use Cases for Massive Scale

  • BRIGADE-LEVEL EXERCISES
  • MEGA CITIES
  • MODELING GLOBAL AIR TRAFFIC
  • THEATER LEVEL WARGAMES
  • PATTERN OF LIFE TO FILL YOUR SIMULATIONS WITH CIVILIAN ACTIVITY

Learn More

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MAK Legion Brochure

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Customer Support

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Success Stories

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Key Features


  • Thread-safe Data Store

    Enables applications to simulate, read, and write many entities in parallel – taking full advantage of available hardware.

  • Data-Oriented Design

    Highly-optimized run-time data storage - in contiguous memory for cache coherency. Object-oriented API layer provides ease-of-use.

  • Data Remains in Single Consistent Format Throughout the System

    Network Library, Data Store, and Entity Server designed as one coherent system -- Eliminates expensive data copies, marshalling, and conversions

  • Optimized Network Utilization

    Thousands of entities bundled into a single large packet each frame Entity Server sends only the data needed by each client, and only what’s changed.

  • Relevance Filtering on the Server

    Server’s Data Store is spatially organized and the Server filters against interest criteria. .


  • Spatial Organization & Ownership Transfer

    Keeps entities spatially organized as they move through the virtual world.

  • Optimized for Late Joiners

    All clients get their updates from the server, so late joiners don’t burden every simulator to provide initial state.

Resources for Customers

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Users Guide

Legion 1.1

ST Engineering