(Warfighter Digital Twin) is a software framework for building warfighter digital twins. A warfighter digital twin is a digital replica or representation of a warfighter, including his physical, biological, physiological, behavioral, mental, and cognitive features and characteristics. The construction of WDT is based on the individualized and unified digital human models combined with personal data containers.  It will transform existing military systems to ecosystems, so that advanced technologies of big data, data analytics, machine learning/deep learning, artificial intelligence, and live, virtual, and constructive (LVC) simulation can be utilized to make the US military forces faster, stronger, smarter, and more efficient.