Abstract: In recent years, the typical form of warfare has been witnessed to evolve from the nuclear deterrence in the physical world to the so-called intelligence deterrence in Cyber-Physical-Social spaces, resulting in a critical need for new intelligent technologies in military application scenarios. In this paper, we proposed the issues, methods and applications of blockchain-powered military systems. We elaborated blockchain's technical characteristics, which can be summarized as "TRUE" (i.e., Trustable, Reliable, Usable, Efficient and Effective) and "DAO" (i.e., Distributed and Decentralized, Autonomous and Automated, Organized and Ordered), and pointed out that blockchain has the potential to be the cornerstone of military intelligence. We also analyzed the significant role that blockchain plays for military systems, and discussed blockchain's potential application scenarios in military fields including military information systems, military knowledge automation, drone cluster, among others. Towards the end, we presented the conceptual framework, fundamental theories and research methods of parallel military blockchain. Blockchain can help overcome the giant gaps caused by asymmetric information and bounded rationality, and transform the asymmetric warfare into symmetric peace.