CISA's first architecture effort supporting the C4ISR functional area is generating a Capstone C4I Architecture. As a preliminary step, CISA will develop an overarching framework for C4ISR operational and systems architecture creation by DoD components. By adhering to this framework, CISA and DoD components can analyze architectures consistently, and determine information exchange requirements, as well as the frequency, timing, and conditions affecting those exchanges. CISA is supporting development of an integrated C4I systems architecture at the U.S. Southern Command. The C4I Systems Architecture will be a template for further command-level C4I systems architecture integration. A joint C4I Tactics, Techniques, and Procedures architecture is also being developed for command and Service use as a guidepost for conducting joint C4I operations. CISA will compare and contrast operational, systems, and technical architectures to develop a set of common architecture generation practices, enabling consistent comparison of future architectural efforts by any DoD component.