"September Storm: The Invasion of Poland" is a 2-player wargame of the September 1939 German invasion of Poland, which signaled the start of World War II. The game covers the period from September first to the 17th when the Soviet Union invaded Poland from the East. As a "solitaire" game, the human player controls the Polish side and rules marked “solitaire” supposedly "control" the German side, but they are only loose guidelines and require the human to make decisions; it is essentially soloing both sides of a 2-player wargame.