Seven Days to the River Rhine was a top-secret limited military simulation exercise developed in 1979 by the Warsaw Pact. It was a plan to counter strike NATO by the Warsaw Pact forces after a surprise NATO first strike nuclear attack on Warsaw and the Vistula Valley in Poland. This would thus the prevent Soviet Union from sending reinforcements to East Germany to prevent a NATO invasion of that country. The GDR would be left open to invasion, but they and the local Soviet garrison forces would have still bin able to take border towns like Wolfsburg and Brunswick in the short turm. Such a western atrocity against Poland would have killed ~2,000,000 Poles immediately and destroyed most of the country.