This paper describes techniques used to successfully link ground vehicle and aircraft simulators at widely dispersed sites into a common network. This network enables the crews of each of the simulators to see and interact with each other in a realistic battlefield environment. Fully-manned platoon-, company-, and battalion-level units may fight force-on-force engagements in real time over the network. The network design uses a distributed simulation approach aimed at minimizing both communications processing loads and simulator complexity. This approach involves abstracting, thereby reducing, the information that is broadcast among the simulators. It achieves an appropriate three-way balance among computation requirements, accuracy of vehicle state representation, and communication loads.