Just finished watching Captnducks tutorial, when will the goblins ruin my day?
Depends on how close you are to the nearest tower. Usually you'll get ambushes first around years 2-4 and onwards. Thieves and
child enthusiasts snatchers come around the time the ambushes start and onwards or before them, they're more like a steady source of silk goods and daggers instead of day ruiners, though. After a couple of years or so after the ambushes you will get sieges. You may not get anything at all, or it may take insane amounts of time to get attacks.