The document presents the Spanish military's goals for the development of a modeling and simulation (M&S) infrastructure aimed at enhancing interoperability, reusability, and cost efficiency. It outlines technological objectives and requirements for creating high-fidelity simulations that support the integration of various simulation assets within an open and distributed architecture. The Spanish MOD seeks to transition from monolithic systems to a modular approach using Data Distribution Service (DDS) to improve the flexibility and capabilities of future simulation systems.