re Glessin, I was going for it being a bit of everything. He mentioned Neane and Coamis, then the OO fleet, then "a billion Cardassians" which I intended refer to the final assault on Cardassia Prime.
We knew of course that Taran'atar would go aboard the Even Odds
from the end of The Soul Key. But it was only when I realised that there was already a Cardassian established who was a survivr of a Jem'Hadar attack that I realised "Ah-ha! There's my story." That was also what happening right at the beginning, when Brad describes him as "curled up in a ball, talking to himself" - he was remembering the original attack on the OO fleet.