We're able to drive wolves away from civilized land well enough. Dragons are bigger, but the principles can't be all that different. Make our lands somewhere the dragons don't want to be, and they won't be there.

( it's a very simplified version of reality, and conveniently ignores that most of what makes sites of civilization inhospitable to wolves is that they die in them... but adalia is not concerned with details at present. )

We'll be waiting, goodsir!