As the United States faces a rise in credible antiaccess/area-denial (A2/AD) threats, the U.S. Department of Defense (DOD) started developing counteraccess denial strategies early in the twenty-first century. Access denial strategies are not a new defensive strategy; what makes access denial challenging on the modern battlefield is the dramatic improvement and proliferation of weapons capable of denying access to or freedom of action within an operational area. Through a historical review of Japanese naval battles during the early twentieth century, a framework to model possible future contests for control of the maritime domain is possible. Control of the maritime domain is the prerequisite for assured access and sets the condition for successful Joint operations. In this article, recommendations for achieving success in this new operating environment are offered, including investing in low-cost technology that extends ranges of A2/AD capabilities.