History is a strange thing. We read about it almost as though it's fiction. It's difficult to relate to something from so long ago while living in a present so completely different from the past.
But the truth of the matter is that the past is filled with people, decisions, and moments which have all led to this moment. This reality. This now. And the past cannot be changed. It is written indelibly in history, sometimes in truth, and sometimes in fiction. But all we can do is learn from it and hope (though usually futilely) that it won't repeat itself.
As war looms nearer, Rory must focus on stopping whatever Morgan's plans are. However, she's also forced to decide what is more important: knowledge of the future, or the truth of the past.