I have just started playing a Dwarven Foehammer in PFS (still 1st level). I have played one session and he used an Earthbreaker.
However, I have just realised that I can't see anywhere whether the Earthbreaker or the Dwarven Longhammer are in the hammer weapon training group, and thus qualify for the Foehammer abilities.
Have I missed this somewhere? Or am I limited to using a warhammer with my Foehammer dwarf?