US Army along with troops from 14 other countries, recently kicked off an exercise in the Texas scrub dubbed Network Integration Evaluation 16.1. A variety of remote controlled and otherwise easily assembled perimeter defenses were among many new technologies on display during the practice sessions.
http://www.blacklistednews.com/The_Army's_Futuristic_Guard_Posts_Are_Trailers_with_Pop-Up_Gun_Turrets/46549/0/38/38/Y/M.html