Evanburg is a townsland, not a city.
And well to be fair, Vallyn was talking out of his arse when he said that. Unless he actually predicted the defection of three lords, the subsequent diplomatic slight by Julius and the declaration of war. His assertion was baseless.
"Diplomatic slight"? Shameless Aurvandilians...
Indeed a diplomatic slight from Aurvandilian side. I guess the change of mind of Aurvandil regarding relations with Barca would have been different if those nobles wouldn't have switched carrying their regions with them.
