Modeling and Simulation of Weapon Systems and Munitions is a key enabler for exploring warfighting capability needs and system operational opportunities, and translating emergent technologies to robust, validated solutions that fill needed design spaces rather than provide point designs of limited relevance and durability. The intent is to increase the breadth and depth of system engineering and to explore and validate design spaces that are either untestable, too difficult to test, or too expensive, and time-consuming to test. The desired end state of this portfolio is an integrated toolkit capability encompassing the investments, discoveries, and inventions pertaining to future systems.