Combatant commanders and their subordinates will need to act with allied forces under the umbrella of the Chairman's mission command system, meaning a commander's intent must be transparent to multinational forces. Interoperability between U.S. and UK forces, for instance, can be streamlined through resolution of cultural, doctrinal, and communication/information systems. Immediate steps include continuing exchange officer placement, combined training exercises, and standardized rules of engagement. NATO Allies and other partners can be drawn in as needed, and the Naval War College should continue to take the lead in following this Chief of Naval Operations directive.