How to complete the third challenge to obtain american civilization?

I don’t know how do I build the docks

You must collect 200 of wood for each dock, take a villager and hit the button “dock” under construction, or with the hotkey “D”, then place the dock with the mouse near the coast (sometimes it can cost, I suppose for the hitboxs) and let the villager build the dock and repeat the process 3 times to have the 3 docks. Finally, don’t forget you win the game to make it count!

It dont work for me I 've tried 3 times with bots (solo)

Have you tried playing on a map with water? :stuck_out_tongue:

I wasn’t winning the game, I didn’t think it was necessary. Thanks for the answers