The tenth stage of the "Van Kanigem" tournament.

They wouldn't give it to me((( I would have taken it right away... But I had to wait.

That's strange, try loading the starting save again and you should get to level 2; they should have offered it.

Is this 100%, just like building level 5 units, or are there differences??? I'm asking for the future.

Everything, of course, depends on the starting level of the city and the buildings in it, the amount of free resources on the map, etc. But quite often, he doesn't have time to build a Citadel. The other thing is that he can fortify himself there with Ents or Hydras, and then he can hold his ground even without a Citadel.