Civilization – Unconnected Territory Civ5

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My civilization has acquired an unconnected tile(see picture below).

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How is this possible? Or simply a glitch?

EDIT: zoomed out version

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I'm thinking it's because El Mirador is being squeezed on all sides it some how determined the floating hex was closest available?

Best Answer

Here are some factors at work

  1. Generally, cultural tile acquisition prioritizes tiles that can be worked by a city. From your screenshots, it looks like there are no available tiles that can be worked by your cities.

  2. Cultural expansion tends to favor tiles with resources. I see coal in the acquired tile.

  3. There is no requirement that all of your territory be contiguous, even new territory acquired through cultural expansion. I have regularly seen civs gain non-contiguous territory through cultural expansion.