Synopsis: The goal of the High-Assurance Cyber Military Systems (HACMS) program is to create technology for the construction of high-assurance, cyber-physical systems, where high assurance is defined to mean functionally correct and satisfying appropriate safety and security properties. Achieving this goal requires a fundamentally different approach from what the software community has taken to date. HACMS will adopt a clean-slate, formal methods–based approach that enables semi-automated code synthesis from executable, formal specifications.