Soyuz ’81: What If The Soviets Had Invaded Solidarity Poland (S81 for short) is a low-intermediate complexity two-player wargame covering the possibilities inherent within the first month of that never-run operation. The Soviet player is cast in the role of aggressor, attempting to make work a classic strategy of “converging columns” advancing from around the periphery of Poland. His success or failure will be reckoned on his ability to bring that country to heel without having to expend an inordinate amount of military and political power to do it.