Fast network dynamics causes topological information to become stale easily. This causes serious problems in the robustness and efficiency of network protocols like link state routing and its variants that are used in tactical mobile ad hoc networks or MANETs. The emerging need to collect and exchange excessive network information increases overhead and degrades network performance. IAI will design and implement SCATE, the Social Cognitive Advancement for the Tactical Edge, on tactical radios for military operations. SCATE provides scalable implementation of multi-layer communication and social network protocols enhancing communications at the tactical edge. Social cognitive techniques can provide tactical edges with situational awareness of the mission and support users, thus sustaining mission-critical network performance in any MANET environment. A probabilistic model for social and communication network interactions will be developed alongside SCATE. Robust, scalable, and efficient social and cognitive techniques will be designed to enhance tactical MANET communications and routing at the tactical edge. SCATE will enable distributed decision making with local information only, as needed at the tactical edge. Performance gains will be demonstrated with respect to traditional network protocols in a wireless emulation testbed environment with real radios.