I was just wondering if the dragons in the BattleLore world had any background fluff?

Some fluff is provided in the adventures that are supplied with this expansion.  For example:

Only by my words will the stories of
these great creatures be told. Most
others that fought against these monsters are
either dead or have taken an oath of silence
and will not give an account of the events
and deeds of these days. I have encountered
three dragons in my lifetime, each one more
dangerous than the previous one. Perhaps
one day the nobles will admit the truth: these
beasts are real, these beasts defeated our
army, and these beasts are alive still.

(from the first dragon adventure: Poisonous Pines)

This is another area of the game that some have wanted developed - the fantasy background.  Presumably campaign-ish expansions would address a more interwoven game world - I was fond of the premise of Uchronia, the alternate Europe presented by the core game, but never really developed beyond the expository background notes for various adventures.

As long as the game play remains rich, I'm satisfied :)

Ok thanks for the info! Ah well, would have been neat. Always love dragon lore and was curious why these one's would fight in an army. Or if they're intelligent or just beasts. That kind of thing.

Well, on the last scenario named There Be Dragons, it says one camp had hired the fire dragon while the other two were allied to the enemy. I'd say this suggests they're intelligent.