It wasn't just the left flank of the Minotaur's subgroup that had started, but the main battle line and the right flank also began firing at the First Battle Group, targeting their Vanguard. The intensity was obviously much higher than that of the left and right flanks, because the majority of their forces were on the main battle line.
They had with them all the battle cruisers, battleships, destroyers, frigates, and even the superstructure of a Star Fortress, totaling about 2,400 ships. The left and right flanks of the Minotaur forces focused on the opposite flanks of the Void Fleet's First Battle Fleet.
The First Fleet was not to be left behind. The Vanguard and the left and right divisions of the First Battle Group also began opening fire. The left and right divisions targeted the Minotaur flanks, while the Vanguard focused on mostly defensive tactics.