I'm on the 5th year of a a population capped fort and named it Assaultruin.
At first, I wanted to make soldiers for raiding and such, but I've read mixed bugs about it, so I did not send out any artifact stealing yet.
I began with pop max 20, and with a large forest embark with 1 layer aquifer, I supported a metal industry using charcoal. I steadily increased to 30, and now 40 pop.
So I have a baron, then recently became a dutchy. I have 28 military; 1 admin, 1 mechanic, 6 miners / mason, and 4 kids (2 of which will be adults soon).
Everyone that is not a miner have highest moodable for weapon or armor. I also strictly only smelted iron, pig iron, and steel.
Artifacts are 2 steel battle axes, 2 steel spears, 1 steel short sword, a stone grate, a mask, and some other kid created crap.
I dug a 3x10 tavern floor with retracting bridge; through an aquifer layer that serves as water source for drowning.
5z below, I lined with galena blocks since I will not smelt lead bars. I also starting using iron cages, so it is set with 30 iron cage traps.
When I pulled out the floor of 20+ visitors, some get stunned and get caged trapped. Others just get stunned but not caged. So they were drowned.
I used a portable drain, and reset new iron cages.
I think I will dig a long hallways and display my captured visitors. Too bad the leopard woman did not get trapped.