There is deep mistrust between the two sides and the Cold War becomes volatile. The Soviet Union threatens NATO with a neutron bomb and actively exercises in its border areas. NATO deploys more missiles in Europe and organises a massive military exercise. Soviet submarines invade Swedish and Finnish waters. Sweden increases its readiness in the north and Norway builds bunkers. Finland strengthens its air force and control of Lapland. A Soviet missile strays into Finland. In the end, nuclear war was just a push of a button away.