China has invaded the oil-rich Spratly Islands. The American response has been swift - and deadly. And the Third World War has begun... Captain Bartholomew Mackey is the skipper of the U.S.S. Cheyenne, a nuclear submarine dispatched to the Spratlys to protect a carrier group. But in a few moments, the Cheyenne's mission - and the world - have changed, as a tense situation has exploded into a full-scale war of nightmarish proportions. Tom Clancy presents fifteen thrilling scenarios - fact-based mission profiles for Captain Mackey and the Cheyenne - stirring plots and characters, perfectly accurate details, and the chilling knowledge that it really could happen...