Bridges

• Engineers can build bridges on a river.
• Engineer, dynamiter and infantry units are the only units which can cross river cells, but their AP cost is doubled.
• A bridge is a road on a river, it's only a more expensive cost in AP to build it.
• A bridge grants river crossing to other units .
• Be careful, if a bridge is destroyed, all units on it will fall and drown (and die) in the water, even if they are infantry or engineer, or whatever... (err... for example a Camp or a HQ !!!)