The part about the GTVA 6th fleet casualties is true enough, its in the command briefing for the mission to defend ENIF station, and the Intel on the NTF in the tech database talks about how 6th fleet Admiral Bosch rebelled and took a sizeable chunk of the fleet for his NTF, and he's got
at least 8 destroyers (NTD Jacobus, NTD Normandy, NTD Repulse, NTD Andronicus, NTD Cyrene, NTD Vasa, NTD Uhuru, NTD Vindicator) under his command, a bunch of corvettes (NTCv Belisarius, NTCv Hawkwood, NTCv Sevrin, NTCv Jacquerie, NTCv An Luchan, NTCv Pax, NTCv Perseverance, NTCv Yo****omo, NTCv Congreve, NTCv Danton, may have been more) and countless cruisers. Let's not forget, this war had been ongoing for 18 months so there had been losses on both sides (cruiser/corvette replacements I can see, don't know how Bosch could build a destroyer in that kind of short timeframe though...)
As for how many fleets were helping fight Shivans, I stated that it was my opinion. 2 fleets, the Terran 3rd Fleet and the 13th Vasudan Battle Group I know were at the frontlines against the Shivans, any other fleets I'm not sure of. If each system had at least 1 Arcadia with full fighter complement, then it is possible all the fleets got mobilized to Capella/Vega/Epsilon Pegasi to assist. Like I said, this much I'm as much in the dark as you are
