The background:
My 17-year old fortress has 3 seperate Goblin entities around it, sieges have arrived (and been slaughtered) very frequently for at least 12 years now. The year is 684, so the world is not very young anymore, but also not very old. I modified the world gen files to have more balanced population numbers, which means goblins now need to eat and have a littersize of 1 to 4. I sadly don't have the starting population (year 666, I ran another fortress from 666 to 667) anymore, but in 673 the numbers were 3442 dwarves, 42599 humans, 15147 elves, 33799 goblins and 3227 kobolds. Now, in the year 684 the population is at 3635 dwarves, 42873 humans, 14826 elves, 38822 goblins and 3796 kobolds. So, the (goblin) population has grown, even though they tried flooding my fortress in their blood time after time.
Now to my question:
The last siege that I had consisted to 50% of recruits, 40% trolls (after several troll-less sieges) and 10% soldiers with normal combat skills.
What happened? Did they run out of normal soldiers because I killed them all? I read somewhere that goblin sieges now don't spawn out of thin air anymore, but are taken from the actual population, which I find quite interesting.
I was hoping for sieges to get more powerful over time, not turn into waves of untrained peasants. Then again, who knows, maybe they are really, actually trying to drown me in their blood - or maybe it was just a way to make me feel safe before they bring out the big guys (mounts, hello? Anyone? No? Meh.). Not to mention, half of them ran away after the others got trapped and were barraged by bolts from my archery tower.
I felt like the sieges had become less threatening overall lately, with fleeing enemies becoming somewhat more common.
So...can you actually decimate a civilizations military enough to cause their sieges to turn into this?
Also, how come I got an elf siege at one time, even though I am not at war with them (yet*) - was it just a random raiding party?
(* If they weren't the only option for getting certain animals they'd already receive a very warm welcome to my fortress the next time they arrive.)
Really need to see what the next siege brings! Overall the scariest thing I had so far was a web-spewing hill titan which luckily got killed by the dwarven caravan that was just leaving my fortress - also the point at which I decided that I needed marksdwarves and a defense tower overlooking my trapped siege entrance. I was almost shockingly suprised as a bronze colossus turned out to not be trap-avoid - made that enemy way easier than expected. Still not sure what to do with him yet though. Also learned a thing or two about how not to tame a cave dragon lately...and that my minecart-based transport system was not designed with easily disrupted dwarves in mind ... several broken limbs and one dead dwarven child later I know that NEXT TIME I will be building this differently. But hey, it trains my doctors at least!