Force XXI Battle Command Brigade and Below (FBCB2) is a Linux-based (older versions are Solaris based) communication platform designed for commanders to track friendly and hostile forces on the battlefield. It increases a vehicle commander's situational awareness of the battlefield by gathering information near real-time based on vehicle locations being updated on the battlefield. This information is viewed graphically, and exchanged via both free and fixed text message formats (instead of verbal collection of reports).