War on the Rocks – Genghis Khan and Napoleon Bonaparte used cavalry units and combined arms to wreak havoc in Europe and Eurasia long before debates about the future of the Marines Corps and maneuver warfare. Today, the Marine Corps can also apply these time-tested tactics to develop a “maritime cavalry” and provide an essential maneuver element that complements the latest joint force capabilities and fighting concepts. Perhaps more importantly, creating a maritime cavalry would add a dynamic combined-arms element to the Marine Corps’ latest Force Design 2030 formations and concepts while channeling its “first to fight” ethos.