This is a five-year Broad Agency Announcement (BAA) for research and development focused on tactical network and command and control modernization, valid through 23 March 2030. It outlines a two-phase process where white papers can be submitted at any time, with selected offerors potentially invited to a no-cost technological demonstration before being asked for a full proposal. The work is for the C2-CFT/PEO C3N, located at Aberdeen Proving Ground, Maryland. An updated timeline for Topic Areas 1, 2, and 3 will be provided on SAM.gov no later than 15 January 2026. The government anticipates multiple awards subject to funding availability but is not committed to any award.