More likely Amaris didn't care- he had the Terran Hegemony, crown jewel of the Star League- what did he need with the RWR. Also he expected the Periphery mech divisions to defend the RWR- but by and large they didn't
You are right but I still think he didn't think the Star League Defence Forces would fight for a non-existent State.
And the not showing up of the Periphery Divisions just give more potential to my desperate measures idea (or so I think).
The RWR has a long history of political unrest and revolts- during the Reunification War the Amaris' remained loyal to the SL- it was the citizens of the RWR who refused to join the SL and fought against the SLDF, not the government of the RWR. For that reason I can't see the government relying on slaves or anyone who isn't 100% loyal to the Amaris family.
Ok, no slaves but they had to find the manpower somewhere.
I think prisoners could work.
I don't think Selim would have the resources to pull this off. What Amaris left in the RWR was largely the units he considered disloyal/unreliable and the dregs of the Rim Worlds military. The best units were deployed in the TH.
I might have gone a little too far and will probably decrease the numbers.
I know the best units were deployed in the Terran Hegemony, leaving only second hands units and equipments in the Rim Worlds Republic.
This is why I wanted to give them old and barely functional weapons.