First Blood and First Kill go to me!
I've spent the first few hours of the siege playing "goalie", grabbing idiot civilians standing at the door, drafting them into the army, and sending them to "Last Ditch Ladder", which they'll all rush up in all their civilian glory should it come to that.
Next time instead of having the goblins show up while I'm still herding the cats I think I'll just draft every last stinking dwarf in the place and assume no civilian will ever just stay in the lower levels and smelt ore instead of walking upstairs to the front door like an idiot.
I'll have the "last ditch squad" already prepped and ready next time, no ad-hoc organizing. I'll have a plan for everyone.
Anyway I'm grabbing civilians and drafting them as they run to the front gate and I see a huge volley of crossbow bolts rise up from my fortifications. I hadn't expected that; the right side fortification wall acted as a rampart giving my marksdwarves a clear field of fire to the z-level above. I didn't mean to build a rampart; I was shooting for "ambush". Live and learn. The rampart seems to be working so far, but my intention was for the gobbos to walk over some traps first as they came around the hump then into a barrage of bolts at close range. I figured, "Hit 'em after the traps, use less ammo."
My entrance is a backward L-shaped alcove with a "hump" at the end of the "L". I cleared away the ramps so the enemy would have to come down on the left side of the "hump" then come around the "hump" into the "kill zone". My archers were set so they would (I thought) get a shot at the gobbos as they came around the hump and through the first series of traps, but they had other ideas. First kill goes to me!
code:
+
+Cat
^^ +
v++^ $ +
v++++^^^^+M
++++++++++
Ent
Anyway that's a really rough sketch, the "$" is my trade depot, the "^" are outdoor traps, "v" are the slopes down from the z-level above, "Ent" is the heavily trapped one-and-only entrance. "+" is the fort. "M" is where all the marksdwarves are standing. "Cat" is the poorly-placed catapult. The operator has already deserted his post.
The "hump" is hollowed out with fortifications. I dug it out to handle attacks from the other side of the "L".
All the gobbos are on the z-level above the hump. They brought a lot of archers, but I think there's only 1 square up there that actually has line-of-sight to the Marksdwarves' firing position. I'd have rather beat the archers back with serrated metal disks, but if they're lining up for my archers one-at-a-time I can work with that, too.
I wanted to avoid an open exchange of bowfire, even from behind fortifications, but better fortifications than open ground, eh?