Army Contracting Command–Aberdeen Proving Ground (ACC-APG), on behalf of Product Manager Tactical Communication Systems (PdM TCS), issued this Call for Solutions under DFARS subpart 212.70 for tactical communications procurement, services, and sustainment. Respondents are to submit white papers by November 19, 2026 at 5:00 p.m. EST, while questions and comments were due October 26, 2026 at 4:00 p.m. EST; full submission instructions, evaluation criteria, and technical characteristics are in the attached CSO. Amendment 1 requires verification and nondisclosure documents before eligible vendors can receive controlled or export-controlled attachments.