Space Force Doctrine Document: Space Force

Key Chapter Title List

1. Why We Fight: The Necessity of Spacepower
2. Who We Are: Guardians and Military Space Professionals
3. Our Mission: The Employment of Spacepower
4. How We Fit into the Joint Force: Providing Ready Forces
5. Reference for Military Space Operations Terminology
6. Appendix: History of Military Space Operations
7. Appendix: Glossary and References

Document Introduction

This report provides a comprehensive and in-depth analysis of the latest version of "Space Force Doctrine Publication 1: The Space Force" released by the United States Space Force on April 3, 2025. As the top-level foundational doctrine of the Space Force, this document systematically articulates for the first time its raison d'être, identity, core mission, and concepts for operational employment as an independent military service, marking a new institutionalized phase in the U.S. military's process of militarizing and operationalizing space.

The document begins with a preface outlining six undeniable truths that justify the Space Force's existence. It establishes the criticality of space capabilities to the Joint Force and the American way of life, the necessity of defending these capabilities, the duty to protect the Joint Force from space-enabled attacks, and explicitly states that space is a warfighting domain, not merely a collection of supporting activities. The document further clarifies the Space Force's dual responsibility for organizing, training, and equipping forces, as well as conducting operations as part of the Joint Force. It emphasizes that Guardians are military personnel specifically trained and specialized for operations in the space domain.

The main body of the report is structured around four core questions. Chapter 1, "Why We Fight," starts with definitions of national spacepower and military spacepower, combining statutory responsibilities and mission statements to argue for the urgency of maintaining space superiority in an era of strategic competition. The concept of "Competitive Endurance" is introduced as the core method for gaining space superiority during crises or conflicts while preserving long-term security and stability in space. Its three principles are: avoiding operational surprise, denying first-mover advantage, and conducting responsible counterspace operations.

Chapter 2, "Who We Are," delves into the personnel composition, values, and organizational structure of the Space Force. The document defines the Guardian Spirit, emphasizing its traits as principled public servants, warfighters with a space mindset, and bold, collaborative problem-solvers. Regarding organizational architecture, the document details the Space Force's streamlined functional structure, including the distinction between institutional and operational forces, and the command echelons from Headquarters, Field Commands, Deltas, Squadrons, to Detachments. It also explains relationships with the Air Force, other government agencies, allies, and commercial partners.

Chapter 3, "Our Mission," systematically discusses the employment of spacepower. The document divides the space operational domain into three orbital regimes: Earth-centric orbits, the cislunar space, and heliocentric orbits. It defines three core competencies: Space Control, Global Mission Operations, and Space Access, along with four enabling enterprise functions: Intelligence, Cyberspace Operations, Command and Control, and Space Domain Awareness. This chapter also provides a professional exposition on space system architecture (orbital segment, ground segment, link segment) and the principles and philosophy of spacepower command and control (e.g., mission command).

Chapter 4, "How We Fit into the Joint Force," focuses on integration mechanisms at the operational level. The document details the model by which the Space Force provides ready forces to Combatant Commands, including command relationships such as the Space Force Component Commander, Service Component Field Commands, and Space Task Forces, as well as combat formations like Operational Deltas, Operational Squadrons, and Operational Detachments. The Space Force Generation Model, as the core mechanism for managing the force readiness cycle and ensuring sustained readiness, is also clearly defined in this chapter through its three-phase process: Prepare, Ready, and Commit.

This analytical report is strictly based on the original doctrinal text. It aims to provide defense strategy researchers, military analysts, international security scholars, and policymakers with authoritative first-hand interpretation regarding the evolution of U.S. military space operational thought, organizational structure, and capability development direction. It serves as an indispensable reference for understanding current and future trends in space militarization and the dynamics of great power competition in space.