Quote Originally Posted by Wakizashi
I've never known the AI to build Hashishins so it's unlikely you'll be able to find any as Mercs. A Unit that takes 6 (or 8...or possibly 4 ) turns to build, is unlikely to be disbanded.
The A.I. doesn't disband units as far as I know. Occasionally, a crusade gets disbanded and Teutonic Knights appear in your inn, but I think the majority of mercenaries are automatically generated. How else can you account for the proliferation of siege units when no siege engineer has been built?