Does someone knows information on ''Battle of bitter reach'' (when, why, who, where ...) ?

On Abulon Chronicles ?

The name of the mother of Haarlock (who was also the sister of albrach) ?

Someting on Mathias Haarlock (except what is said on Haarlock warrant in Tattered Fates) ? what was is position on the haarlock line ? Cousin ?

Thx a lot.