Speculation. Wild guesses at worst, and serendipitously somewhat accurate guesses at best. Only the ones involved in the actual Invasion planning know the real story, or perhaps not even they know the entire big picture. Maybe only the original author of it all knows. But then again, in some stories, the tale becomes larger than the author.
The tale becoming larger than the author is rarer than people giving up and the tale becoming forgotten.
Everyone likes a narrative conclusion. I feel like the DM won and still won't give up his secrets when you punch him while eating pizza afterwards.
