The barbarian city grows each time you attack it, so you can only attack it once with your 3 spearmen. The next time you need 13-15 spearmen to do the job. On the next attack you will get both 500 wood and 500 sulphur however, which can be very usefull if you can manage to trade the sulphur for something else, either with other players or using ambrosia. If you’re ready to use ambrosia I suggest you do this, use the 500 wood from the first attack to train 12 spearmen more. Remember though, always send enough cargo ships, for the 2. attack you’ll need 2! In the third attack 40+ spearmen will work, the more you send the less losses you have, and you’ll also need an extra trade ship now, 3 total.

The barbarian population grows as n^3, where n is the number of times that you have attacked it. The resources in the village also increases, but not nearly as quickly. I usually don’t bother attacking it more than 3 times, since after that it will have a city wall and you need rams to break it. On the third attack you will get 500 wood, 500 sulphur and 500 crystal and you’ll need close to 100 spearmen.

You can only attack the barbarian village ten times, and when it reaches level 10 it will have 1000 barbarians in it, if you really want to waste your troops getting it this high. Even with 1000 barbarians in it you will only get 1000 of each resource, not worth it at all. Anyways, hope you found this post useful, feel free to leave comments or questions. Happy plundering!