Just to throw in a note, the Tenth, Eleventh, and Twelfth Sword of Light regiments fought in the War of Davion Succession, fighting alongside the Fourth. Were these regiments disbanded because of their performance in the war? It's possible, they fought very well against the AFFS but eventually surrendered when the SLDF launched Operation Smother. Only the Fourth fought back, and it was nearly destroyed in the process. Then again, other Combine regiments surrendered during the campaign and are present and accounted for in the Field Report. Maybe the DCMS was just waiting for the right time to reactivate the other Sword of Light units, reequipped and hungry for revenge on the Davions?