Civilization V: The Swedish Saga, part 6: The Epic Conclusion
February, 2005 A.D.: Dragonsbane, the first fusion warhead nuclear missile, is completed by the NDU. As it is being deployed, the Greeks drop a third bomb on Tunsberg, cutting off a key supply line to the Norse front.
June, 2005 A.D.: Greek troop transports outside of Megara are sunk by Norse submarines. As their boats go down, they watch the first nuclear missile strike the city they were just deployed from. Megara is nearly entirely destroyed. The lands of Northern Greece, Southern Denmark, and former Germany and Austria, are becoming a nuclear wasteland.
October, 2005 A.D.: The propulsion system for Sleipnir is finished, and added to the nearly complete vessel. Only the main engine is required before the initial wave of colonists can be launched to escape the nuclear fire beginning to consume the world.