Anno 1800
Can you return one built tile during Expand in addition to building?
The rulebook allows one removal during Expand, and a forum post quoting the published errata limits it to one per build action.
Yes, one per build action. The rulebook lets one built tile go back during Expand at any point, and the errata caps this at one per build action. Posters disagree on whether a tile returned by overbuilding uses up that one return; the stricter reading says it does.