Didn't expect it to happen so soon. Started my new fort, just building stuff and trying to find ores when I freaking minotaur shows up. It's only my second year and I don't know what he's doing here so early. Maybe it's cause I dug into the third cavern layer and found a candy pillar, so it increased my fortress value or something. My military is completely untrained and has no equipment (I couldn't even find metal on the map). I order the drawbridge to be raised, but several minutes later, I realize that I forgot to connect the bridge to the lever, reminded to me by the minotaur punching a child to death in my meeting hall (ironically, this happened right next to said lever. So, I ended up recruiting 15 unarmed, unarmored and untrained dorfs to go punch him to death. The damn minotaur kills three more and cripples some people before an engraver punches him in the head and kills him instantly.
So, yeah, that was quite fun, in both meanings of the word. I thought that was gonna be the first time I'm gonna get a 'your fort crumbled' ending (I usually abandon out of boredom), but the casualties were surprisingly low. Still doesn't change the fact that my fortress is completely military-less through. I guess I gotta rely on those caravans bringing me metal bars now.