Ok got with me WD304 and the info on The Knights of the Hammer that you were looking for;
Founded just over 200 years ago
Their chapter house was granted to the by Magnus the Pious.
They wield Warhammers (big surprise there.)
Very pious nights.
Mentions that the nights shave their heads so maybe they go into battle without helms?
Also says they took heavy casualties in SoC of the 100 men they sent 80 died. May take years to recover.