M.A.N.E.

Mutually Assured Nuclear Extinction.

For fifteen years Equestria has been involved in a deadly game of cat-and-mouse with their neighbour to the northwest, the Union Of Saddle Republics. The doctrine of M.A.N.E. has kept things relatively peaceful so far- both nations know that any nuclear attack will be met by a response in kind, and that there are no winners in a nuclear war. But now, border disputes and a few trigger happy ponies threaten to turn the cold war hot...