Book excerpt: "As the US Army faces new and uncertain challenges across the globe, the need to create new capabilities in organizations, doctrine, and equipment is critical. As new threats in the sea, air, land, space, and cyber domains appear, it is vital for the Army to produce capable and well-equipped formations that are prepared to adapt and meet any challenges. This work examines the relationship between peace-time innovation and combat adaptation. It uses the history of the 10th Mountain Division as a historical example of how the Army faced threats in multiple areas of the world. In response, it innovated to create a new capability to fight in the mountains. Using new techniques, it recruited highly experienced volunteers, then developed training and equipment to build a new capability for the US Army. As a result of this innovation, the 10th Mountain Division exemplified a highly adaptive and successful formation in combat. The War Department's ability to leverage innovation to create an adaptive organization is relevant to the contemporary Army and how it looks at the current challenges of multi-domain battle and Army War Fighting Challenges"--