The defense community requires a robust capability to represent and analyze the Irregular Warfare (IW) environment across the range of tactical, operational, and strategic levels of warfare. In support of this need, TRAC Monterey is developing a prototype capability that credibly represents ground forces conducting Counter Insurgency (COIN) operations focusing on the relationships and interactions with a population of interest. While understanding the validity of the M&S of physics-based systems for a given use is well-understood and physics-based combat models have a long history of use, methods and tools for assessing the validity of M&S in an IW environment are not readily available. In recognition of this need, we have developed a measurable, repeatable method for assessing, understanding, and describing the risk of using an M&S for analysis. This approach is unique in that we have developed risk measures for using a model or simulation for a specified application and criteria for assessing the risk of using a model or simulation based on consequence, error, and validation process. To exercise validation methods developed in this effort, a validation of the Cultural Geography Model (CGM) was performed to assess the appropriateness of the CGM representation of the Conflict Ecosystem conceptual model; the Social Network Representation within the CGM and the whether this representation is generalizable to conflict ecosystems in any region; and the representation of social science theory within the CGM, specifically tracing the implementation of the Theory of Planned Behavior. The work builds upon the experience and insight gained in the Agent-Based Simulation (ABS) Verification, Validation, and Accreditation (VV&A) Framework Study sponsored by the Marine Corps Combat Development Center (MCCDC).