The idea of invisibility has fascinated people for millennia, inspiring many myths, novels, and films. Invisibility cloaking has recently become a subject of science and technology. This paper describes the important current theoretical and experimental developments and tries to project into the future.
From Multi-Domain Battle to Multi-Domain Operations. TRADOC Pamphlet 525-3-1, The U.S. Army in Multi-Domain Operations 2028 expands upon the ideas previously explained in Multi-Domain Battle: Evolution of Combined Arms for the 21st Century. It describes how the Army contributes to the Joint Force’s principal task as defined in the unclassified Summary of the National Defense Strategy: deter and defeat Chinese and Russian aggression in both competition and conflict. The U.S. Army in Multi-Domain Operations concept proposes detailed solutions to the specific problems posed by the militaries of post-industrial, information-based states like China and Russia. Although this concept focuses on China and Russia, the ideas also apply to other threats.
FM 3-14, Army Space Operations, provides an overview of space operations in the Army and is consistent and compatible with joint doctrine. FM 3-14 links Army space operations doctrine to joint space operations doctrine as expressed in JP 3-14, Space Operations and other joint doctrinal publications. This FM establishes guidance for employing space and space-based systems and capabilities to support United States (U.S.) Army land warfighting dominance. It provides a general overview of overhead support to Army operations, reviews national guidance and direction, and outlines selected unique space-related Army capabilities. The doctrine in this manual documents Army thought for the best use of space capabilities. This manual also contains tactics and procedures outlining how to plan, integrate, and execute Army space operations.
If one is to realistically entertain the notion of interstellar exploration in timeframes of а human lifespan, а dramatic shift in the traditional approach to spacecraft propulsion is necessary. It has been known and well tested since the time of Einstein that all matter is restricted to motion at sublight velocities ( << З х 10⁸ m/s, the speed of light, or с), and that as matter approaches, the speed of light, its mass asymptotically approaches infinity. This mass increase ensures that an infinite amount of energy would Ье necessary to travel at the speed of light, and, thus, this speed is impossible to reach and represent an absolute speed limit to all matter traveling through spacetime.
А theme that has come to the fore in advanced рlаnniпg for long-range space exploration in the future is the соnсерt that empty space itself (the quantum vacuum, or spacetime metric) might bе engineered to provide energy/thrust for future space vehicles. Although far reaching, such а proposal is solidly grounded iп modern physical theory, аnd therefore the possibility that matter/vacuum iпteractions might bе engineered for spaceflight applications is nоt а priori ruled out.