Senior Army and Marine Corps leaders met last week to discuss the concept of Multi-Domain Battle, according to the head of Training and Doctrine Command. Gen. David Perkins said during a May 11 event hosted by the Association of the United States Army he had just shown "a rough draft" of the next Army field manual, FM 3-0 Operations, to Chief of Staff Gen. Mark Milley and "guaranteed" its release by October. Perkins previously described FM 3-0 to Inside the...