A large number of assault ships were destroyed by the Floating Cannons of Pandora and Visca, and the surprise-attacking Single Soldier Fighter Jets hardly achieved anything before most of them were lost in fireworks. Those perpetually silent Imperial "Rebels" finally realized the thorniness of the Federation Army on this side, and as a show of sincerity, they gave us a big gift:
Over half of the Imperial Mother Ships shifted their attention away from the nearly annihiliated Queen's Fleet, and then they gave us a simultaneous firing, a salvo from the Galaxy Main Guns.
How powerful can the simultaneous firing of more than a hundred Galaxy Main Guns be?