Jihad is the start of the Dark Ages storyline. The Word of Blake breaks away from Comstar, and decides they need to level the entire IS in order to bring about their mythical golden age. They spend over a decade plotting, then hit EVERYONE. Nukes (against strategic targets and civilian poplations alike), biological weapons, fake IDs on warships and units, every dirty trick in the book.<br/><br/>They stir up fighting between every IS faction, and the entire IS goes to hell.<br/><br/>Thats about as much as I know of it. Someone more familiar with that part of the story can fill in details.