My airlock corridor seems jinxed somehow. It's never ready (having a raising drawbridge, connected to an appropriate lever, in both ends) when invaders come.
Fortunately, my axe squad's leader is some kind of überdorf berserker who took an arrow in the knee and still lopped the heads off of a dozen trolls and a few human and goblin bowmen. Meanwhile, some poor saps tried in vain to chop through the trolls' {(large goat leather cloak)}s with a copper battleaxe, but to no avail. Copper axes are utterly useless in combat as far as I've seen.
Marksdorfs are still at a loss with the esoteric concept of "bolts"; even their leader insists on bashing in skulls with his artifact lead crossbow. Fortunately, due to its density, lead makes for a very good bludgeon.
Instead, a random hunter actually shot a retreating troll in the head and slowed it down enough for a hammerdorf to crush its skull.
Also, goblin bowmen shoot at keas, as it turns out. One of the thieving parrots lost a leg and a wing to some {(silver arrow)}s, and the heroic bowgoblin experienced a morale boost.
Another problem with invaders is their corpses filling up the corpse/refuse stockpile...
(Can you get the dorfs to bury the dead enemies somehow?)
Oh well, once my shaft from surface to the magma sea is ready, garbage disposal should get a lot easier.
The caverns contain at least two Forgotten Beasts, the new arrival being a poisonous giant python. There's apparently also bugbat pups that grow up to bugbats, something the game feels obliged to inform me about for whatever reason. I haven't found where they are though; the only bugbat I've seen is the dead one beheaded by one of the Beasts. Fortunately, they haven't found my well that opens up to a lake in the caverns.