Thracia 776 Manga Get!

We interrupt the oh-so-exciting account of my playthrough of FE4 to announce that I have just received in the mail the three-volume manga adaptation of Thracia 776 by Yuna Takanagi.  Not that I can read a word of it, besides the back cover, which uses the English-language intro to FE5 as its synopsis.  Make that Engrish language, as IIRC the actual intro wasn't this mangled.  But I can look at the pretty pix and piece some stuff together based on the game, can't I?

Now, three volumes is awfully... concise... for a game as convoluted plot-wise as any other FE game.  Maki Hakoda's FE1 manga was about twelve volumes (of the same size and thickness) and didn't even tell the whole story.  So, either this is a masterpiece of storytelling or things got left out.

( Guess which option is correct. )