This has me really confused now. Tried to search, but only found some threads of loose relevance from 2009 and 2010, so here is a new one. First off: Spawn-busting is the form of dark arts that is well-known by now, thanks to the work of the legendary DanF-something (he doesn't show up with @-trick). It means that if you have a unit placed in the fog (or anywhere), a barb cannot spawn in the region two tiles from that unit in all directions (so 25 tiles in total). I am 99.9% sure this also applies to barb galleys, which is why I've seen seriously good players like @Fippy plan for that in competitive play where they place warriors in such a fashion that they cover the tiles on the coast as well, so that barbgalleys cannot spawn and ruin her seafood/day. So then, imagine my surprise when a barb galley suddenly spawn, given this protection: The chariot "protects" the grey square of 5x5 tiles, including the darkened tile in the corner. The city itself covers the row south of it, as they are highlighted (not in the fog of war) -- even without the worker there (I tried to delete him). Yet a barb galley somehow showed up here. All the tiles further south are ocean tiles (only 1 ), so my initial WTF thought of there being an island further south probably cannot be correct (galleys can't travel on ocean tiles, unless you control the cultural borders there). But what on earth has happened here?