NATO and its partners extensively use Modelling and Simulation (M&S) for various purposes like training, mission rehearsal, decision support, and in acquisition processes. The NMSG’s mission is to promote co-operation among Alliance bodies, NATO Member Nations and Partner Nations to maximize the effective utilization of M&S. The NMSG facilitates pooling and sharing of M&S resources and capabilities, efforts and knowledge of nations to provide more than any individual nation could on its own. The NMSG helps nations and organizations to align M&S-related investments and efforts, and to avoid redundant work.