How many fortification discs are supposed to be in the game? The rules don't say (though they describe them as black discs and mine are grey), and my copy has only 5, one for each empire in the full 5-player game, which makes it difficult to select the option of fortifying a province.
The best picture of the game I see in the gallery has 5 of them also. I'm out of town, so I can't peek in mine. Hopefully someone else will be along that can put this to rest.