Hello, I am looking for an alternate history that I saw online years ago. The basic premise is that our world comes into crosstime contact with a world where Alexander the Great lived longer. The one detail of the story that I recall is that the US felt threatened enough by this "Hellenic Superstate" that it sent an 80 megaton H-Bomb through a portal as a "first strike." If anyone can point me in the right direction, I would be grateful. Thanks.