Nice Ice, very appropriate link! I'll have to count convectional forces in 3067 (FM Updates, etc.) too
Looked on sarna.net for the population numbers last night and here is what I found.
Tukayyid - 3,700,000
Dehgolan - ?
Ueda - ?
Karbala - 1,841,000,000 (3025)*
Grumium - 350,000,000
Al Hillah - ?
Orestes - 6,311,000,000
I'll have to poke around for more information if there is any. Fluff wise there is talk about refugees as I stated before displacing natives - taking jobs and what not. Going by the names of the planets they appear to be Islamic or Azami in nature - could this be why the natives are so restless? Rasalhagians (Swedish, Norwegian, Danes, plus), Draconis (Japanese), and Lyrans (Germans plus more) would be a very different ethnic mix in the region.
A word on Militia numbers, I generally go by Hot Spots (FASA 1679) for my numbers on Planetary Militias or rather Planetary Garrisons as it refers to them (pg 18-20). If we all agree that each of these seven worlds would fall into the Large Planetary Garrison then each would have approximately 1 battalion of Mechs, 1 battalion of armor, probably a regiment of infantry (foot or mechanized most likely with varying arms), 3025 Tech Level, and I'd say Good Equipment rating (no random damage at least after a year or so).