End of year 7 at Windmirrors and the goblins have put in an appearance.
Five infantry squads (mace, mace, axe, xbow, xbow) and three squads of trolls. They hit all three access tunnels with a troll squad and one or two infantry squads.
The north tunnel gets all the crossbow goblins. Their leaders dodge the flimsy training weapons in the traps - and discover the joy of magma swimming. Most of the trolls join them - or are killed by the more lethal traps that lie within the tunnel. This leaves about twenty crossbow goblins milling around the exit of the tunnel.
They get hit by a dozen well-armored melee dwarves coming through an opened drawbridge. The goblins get off a ragged salvo of bolts before being engaged by a mix of axe, sword, spear, and hammer dwarves. A few goblins manage to flee while the rest are hacked down without mercy.
The south tunnel attack is much the same - leaders dodge into magma along with the trolls. And the few that go further get chopped up by serrated discs. The buzzard attack that materializes at this time flies over the magma but gets decimated by the weapon traps. A bunch of melee goblins are milling around here as well.
However, at this point the Axe Squad appears, along with a Swordmaster from another squad. The exit to the South Tunnel gets a fresh coat of goblin blood as the four dwarves obliterate the goblins there. The sole casualty is the squad commander getting kicked in the eye and suffering some vision impairment.
The East Tunnel assault hits traps that mangle goblins and trolls. The squad then breaks and runs.
Estimated goblin casualties are sixty to seventy along with twenty-four trolls killed. Dwarf injuries were a bruised eye (already healed) and a bruised lung (being diagnosed).
[Addition: During the clean-up I suddenly note dwarves unwilling to go near a tunnel exit. I'd already cleaned out a goblin straggler there in a ditch, so it must be something else. And on top of a constructed wall (an incomplete watchtower) I find a goblin bodypart and an intact troll. Who somehow teleported up there and is now scaring the civilians. The marksdwarf squad is sent for and the troll becomes target practice. And then the civilians go back to hauling work.]