A Grand Duchy, at one time was a term used to describe over-sized duchies, with more powerful dukes, sometimes called Grand Dukes or what later became known as Archdukes.
- 3I territorial division
History & Background (Dossier)
The Syleans, in particular, used this terminology and it was much more widespread in the early Third Imperium than the later, more mature Third Imperium, in which the term slowly went out of usage.
References & Contributors (Sources)
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