Lawrence Livermore National Laboratory

Conflict Simulation Laboratory

Enabling high-resolution, data-driven conflict simulation for US military, domestic, and international partners

Since 1974, the Conflict Simulation Laboratory (CSL) has provided state-of-the-art simulation and modeling tools, including the Joint Conflict and Tactical Simulation (JCATS) and the JCATS Low Overhead Driver (JLOD).

JCATS is a discrete event, constructive simulation that simulates effects-based, entity-level conflict scenarios. JCATS may be used stand alone or in federations using High Level Architecture (HLA) or Distributed Interactive Simulation (DIS) bridges.

JLOD is a multi-sided, white cell simulation tool that models force interactions on a global-level down to the individual entity. Together, JCATS and JLOD enable world-wide conflict simulation with high-fidelity simulation in targeted areas.

The 12th JCATS International Users Conference was recently held in Vilnius Lithuania from 15 – 17 May 2018. The conference was very well attended with 18 countries represented and a total of 54 personnel in attendance. We thank our host country, and a special thanks to SSGT Rimas Jokubaitis for an outstanding conference.


JCATS and JLOD are transitioning to the RHEL V7 Operating System. JCATS V14.X and JLOD V6.X will be supported on RHEL V7.5 (7.6 if it is released) as the preferred OS with RHEL V6.10 as an alternate. However, follow on new releases of the JCATS and JLOD will only be supported on RHEL V7.X.


23 July – 3 August 2018

    JS J7 JLVC 2018 IE5

17 – 28 September 2018

    JS J7 JLVC IE6

24 – 28 September 2018

    NATO CAX Forum 2018
    Sofia, Bulgaria

15 – 26 October 2018

    JLVC 2018 VE1

22 October – 1 November 2018

    JCATS Training in Oman

26 – 30 November 2018

    JLVC 2018 Operational Acceptance Test
    (JCATS V14.0 & JLOD V6.0)

Latest Releases

JCATS: V12.3 Patch 4 (V12.3.4)

JCATS: V13.0 Patch 2 (V13.0.2)

JCATS: V13.1 Patch 2 (V13.1.2)

JLOD: V5.1 Patch 2 (V5.1.2)

Upcoming Releases

3 January 2019

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