I've long accepted that the capital gives units a defensive bonus. Someone today asked if I was sure about that. The civ III combat calculator says that it does. But, if I look at the section for the improvement Palace in both editors I see 'Center of Empire' checked, but also '0' for defensive bonus, unlike walls. Does 'center of empire' yield some sort of defensive bonus? Or does the capital not provide a defensive bonus?
How have people inferred that the capital yields a defensive bonus for units?
How have people inferred that the capital yields a defensive bonus for units?