Military cyberspace operations have been ongoing since before the advent of the Internet. Such operations have evolved significantly over the past 2 decades and are now emerging into the realm of military operations in the traditional domains of land, sea, and air. The goal of this monograph is to provide senior policymakers, decision makers, military leaders, and their respective staffs with a better understanding of Army cyberspace operations within the context of overall U.S. military cyberspace operations. It first looks at the evolution of Department of Defense (DoD) cyberspace operations over the past decade. Next, it examines the evolution of the Army implementation of cyberspace operations. Finally, it explores the role of cyberspace operations in the escalation of international conflict.