From the Introduction: "The United States is an Arctic nation. As such, the Arctic security environment contributes directly to homeland defense and is of vital importance to our national interests. In 2019, the Department of Defense (DoD) published its most recent Arctic Strategy with the objective of an Arctic that 'is a secure and stable region in which U.S. national interests are safeguarded, the U.S. homeland is defended, and nations work cooperatively to address shared challenges.' The DOD directs the Department to defend the homeland, compete to maintain favorable regional balances of power, and ensure common domains remain free and open. This Army strategy builds on those objectives to identify the ways the Army will ensure land dominance and continue to complete its missions as part of the Joint Force. In order to do this, the Army must understand the Arctic's role in defending the homeland, the complicated geopolitical landscape within the context of great power competition, and how accelerated environmental change impacts future operations. With this understanding, the Army will be able to generate, project, and employ forces able to operate and compete in the Arctic as part of the joint force in support of Combatant Commands and in concert with allies and partners."
U.S. Department of the Army Chief of Staff Paper No.3
U.S. Department of the Army: https://www.army.mil/