New Special Building

OK, so a new idea just popped into my Head. So sort of like Naval, and Local Ports, you get to pick the location for this building. You are limited to 2 maybe 3 of these and they are located on Province Borders with other provinces.

MINEFIELDS

Now there are Pros and Cons, and to be used strategically and to prevent from unintended wars from starting.

PROS: They do excessive damage to all ground units. Provide an extra defense for Provinces. Can be a secret weapon against invaders.

CONS: They could blow up on yourself, unless you deactivate it. Can harm allies and potentially start wars. Can take lots of time to build and deactivate.

Now these could be detected by Scout Units. These however cannot be detected by air units. Opposing Commandos could deactivate these, with a time span of 1 hour.