This is a Broad Agency Announcement (BAA) from the U.S. Army's C5ISR Center, specifically the RTI Directorate, inviting innovative science and technology proposals. The proposals must address three technical portfolio areas: Soldier & Platform Mission Equipment, Spectrum Dominance & Intelligence, and Advanced Technology. The work involves research and development to provide secure communications and networking technologies for the Army. Access to Controlled Unclassified Information (CUI) documents requires a contractor's JCP Certification Number and CAGE Code. Several amendments have been issued to update attachments and responses, with the latest changes highlighted.