I ran the Prasad Satrapy having access to about 30,000-40,000 troops who were professional trained troops plus auxiliaries (Legions, basically) and about the same in terms of additional troops from tributary states and levies etc, which they could only sustain for a short time.

This is why they're able to keep multiple city-states in subservience to them, because of economic and political advantage, the power of the Dragon-Blooded and lots more men (city states under them that I made having between 5,000 and 15,000 troops, with potentially additional levies in desperate situatio...