If the role of the Corps level is in setting the conditions for Divisions to win, how are Divisions and subordinate commands going to conduct their own battle (and command it)? What are their roles in the tactical battle? Where does the line get drawn between levels? Is it doctrinally fixed or dynamic? Modern divisions don't fight like those in WW2, nor as we planned to during the Cold War, certainly not in the same way as they did in Afghanistan and Iraq. This isn't about simply faster Combined Arms warfare: For all the talk about Brigade Combat Teams (BCTs) in the US Army – and those equivalents elsewhere in Western militaries – trying to understand the US Army concept for operations during their "Continuous Transformation" isn't easy. Step forward Colonel Ethan Diven, Provost of the US Army University and Commandant of the Command and General Staff Course to explain what this might look like, how commanders and their staff will need to prepare, and what US PME is doing about the new challenges facing the military leaders at the tactical level today, and for tomorrow.