This is the external manifestation of the Star Gate activating.
It seems that the people stationed at the Star Gate not only lost, but also didn't manage to cut off the power to the Star Gate in time.
Under normal circumstances, it would take a long time to restart a disconnected Star Gate, but if it's just in standby mode, it can be activated at any time.
A mixed fleet that looks somewhat chaotic is gathering around the activating Star Gate.
This fleet is filled with various factions, and even the Fifth Legion's fleet, which should theoretically drive these forces away, is mixed in among them.
It appears that there was internal chaos just as the Fifth Legion was stationed here.
Perhaps they could have suppressed the chaos like the Fifth Legion in the Lucy Star System.
But clearly, when they wanted to do so, other forces that had been driven away from the other four star systems came over to stir up trouble.
