Up until now, the ISC Comms frequency was busy with activity, even if most was just generic chatter.
however the comms go dark as four ships arrive in system.

The up until now in formation ISC fleet from before, scrambles to respond. although the silence of the comms channel suggests possible jamming from the four ships.
the silence leads to many ships fleeing the scene to regroup outside the jamming radius.

The ISC fleet has been reduced to 4 ships. including Graham and the ISC illusion, one farragaut class, one Ilridan class and one Missile cruiser that had arrived earlier.
However in the confusion (or maybe on purpose), the farragaut class opens fire on the other three ships present. leaving an opening for the new ships to begin the battle.

The local tourist beacon begins broadcasting a message in morsecode:
..-. --- .-. / - .... . / .-. . -... . .-.. .-.. .. --- -. --..-- /
..-. --- .-. / - .... . / - .- ..- / ... .--. . -.-. .. . ... --..-- /
-.. --- .-- -. / .-- .. - .... / - .... . / .... ..- -- .- -. ... --..-- /
-.. --- .-- -. / .-- .. - .... / --. .-. .- .... .- -- / - .... . / .... ..- -- .- -. / ... ..- .--. .-. . -- .- -.-. .. ... - .-.-.-
Due to the lack of comms, it is impossible to tell who is on what side here from just looking.
and it's possible one side may turn on the Dyson sphere once the battle is over...