My previous forts all had either a) goblins deactivated or b) huge losses.
Now when I started the current fortress, I swore to let the gobbos have it this time ... it seemed a good omen when I had to cancel my initially planned fortress layout (the place where I wanted the depot was magnetite mixed with platinum). OK, let's put the entrance over there? Found lignite. The entrance is now off to the side
So from the 1st immigrant wave onward, I've constantly had some soldiers and, at times, a fortress guard. (The latter seems fairly pointless - dwarves in the guard will spar and soldier, but it seems to be impossible to un-fortressguard the best fighters?)
So now I have around 100 dwarves, 5 in Fortress guard and some 25 military dwarves sparring. Biggest difficulty is making enough wood and bone bolts
So this is my first fortress that has a not-just-dabbling military ... and my first fortress where trap defense has been a roaring success.
I lost one Hunter/Marksdwarf guy from the first immigration wave in the first siege (he ran forward valiantly ... into some flying bolts.) The only hand to hand combat I've seen since were of the "They're fleeing! After them!" kind which happens if you're greedy for narrow clothing
Trap defense:
Whenever Goblins or wild animals show up, I note:
a) the place where I spotted them
b) the beeline between my fortress entrance and their position. Can you tell where they came from?
c) Check trample marks to verify. That should allow some fairly good guesses as to where they entered the map.
Once you know roughly which route they took: "Weapon traps field" at strategic places. Optionally add stone-fall traps between the weapons traps field and the closest map edge: If the weapons trap decimate them too much, the goblins flee ... hopefully into some more traps.
[Happened to me yesterday in my 3nd siege: Axe Goblins walk into the traps system guarding the area above my main entrance (since I don't want goblins shooting down from there). Some of them got dismembered, my novice xbowdwarves opened fire ... so the Goblins fled. Their route took them across another field of weapons traps protecting my rams for wagons ... one guy still escaped. Won't happen next time ...
The goblin bow troop that arrived from the other edge of the map just walked into one set of traps and decided to leave ... ]
(I think goblins and wild animals share the same spawn points, which makes it easy to guess at their path to your fort. If you're not sure, dig channels to make them walk closer to those traps
(Spent more than 30 minutes micromanaging soldiers when I had my first-ever megabeast, a Hydra. I think about 35 out of 85 dwarves were awaiting the collossal beast, armed to the teeth ... what happens? Hydra sticks a head into one of my Silver Serrated Disk weapon traps, gets decapitated, dies.)
[ March 25, 2008: Message edited by: Trollvottel ]