: I think its at the end of the Myth manuel with the
: glossary. I can't be sure though because I have lent
: Myth to someone else for the mo.
Myth TFL manual, page 47, Glossary:
Twenty Years' War: A war of succession fought in the Province 150 years before present events, in and around Covenant.
No other mention of it anywhere else. What's the significance? Well, Alric was the (underaged) prince of Covenant, so maybe Alric's family aren't the legitimate successors to the throne; maybe Mauriac's are, hence why Mauriac was Prince Regent.