Since the mid-2010s, there has been a concerted effort to professionalize a PLAN “blue force” as an opposition force, or OPFOR, in maritime exercises and training. The People’s Liberation Army (PLA) routinely refers to its blue forces as metaphorical “whetstones” used to sharpen the PLA for a future fight against enemies of the People’s Republic of China (PRC). Efforts to develop a PLAN blue force appear to have accelerated over the past several years in response to Chairman Xi Jinping’s decade-long demand for more realistic combat training. This report examines…