Yep

John's Fleets appeared out of Hyperspace and immediately opened fire on Imperial Capital Ships, the Executor in particular. The Executor, was Vader's Personal Flagship, and it was the prototype for the Super Star Destroyer, in other words, his Legacy's Precursor ship. The Legacy was heavily modified, it had Extremely High Level Shielding and Engines, but the most impressive feature was its Main Generator, the Legacy had a Powerful Generator that could power two and half thirds of the Ships Primary Power-Required Functions, and did so without Problems. The Legacy's Weapons were nothing to scoff at either, they had A secret Defense mechanism, something that John called his Last Line, it was a couple Hundred High Powered Laser Beam Projector's covering the Ships Hull and Armor and used Ultra-Violet and Infrared Frequencies to Direct the Beams, not only could these lasers tear Ships apart starting with their shields, but they could destroy A Bombers Payload after the bomber drops it, hence the name.

And so, just before he gave the order to open Fire on the Imperial Fleet he informed the Ranking Officer aboard the Executor to meet his Ship in the middle of their gap, so that they could show the Rebels the full might of Two Super Star Destroyers, and as soon as they got into practically Point Blank Range, he ordered his Gunners to literally Carve up the Executor. The Executor never even managed to have a chance to fire a Shot at the Legacy, as their primary Guns had been destroyed and obliterated. With their Big guns out of literally out of Commission, the Remaining Imperial Ships soon ever retreated ro safety and survived, or were blasted into Space Dust. He soon recieved a Ship-to-Ship hail from the Alliance Fleet. And on that Channel was none-other than Senator Garm-Bel Iblis.

''It's been a Long time John, we last met when you enlisted into the Military.'' Says the Grey Warrior. ''Yes Garm, it has, I want to speak to Senator Mon Mothma, is she avaliable?'' Asks John as The old Senator Grumbles and his hologram becomes the hologram of Mon Mothma. ''Major. Can I assume that you wish to defect to the Alliance?'' Asks the Woman Curtly. ''Yes, my men and I have discussed it and while I had hoped to change the Empire from within, it is clear to us now, that that will never change so long as Palpatine and Vader Follow the ways of the Sith and remain in Power. I request Asylum and Amnesty for myself and My men, in return for Service in the Alliance, and the Supplies we have gathered over the last couple of Months, which number in the Thousands, I'm Talking about, Weapons, Ammunition, Fuel, Ores, Medical Supplies, Foods, and Explosives. My Ship-Carriers are also yours as are the Fignters they hold. I also offer you My intimate Knowledge of Imperial Intelligence Operatives planted inside the Alliance, Imperial Secret Facilities, and Projects.'' Says John as he Forwards the Information on Imperial Spies to Mothma, as a gesture of Good Faith.'' This is more than We expected, I will have to discuss this with the other Brass but just to be sure of your Sincerity....'' Says Mon Mothma, but John does something better. ''This Is Major Shan to all Ships, Power Down all Weapons Batteries and Forward Shields, allow Alliance Personnel to board and Await further instructions. Satisfied?'' Asks John aftter doing a Tactically suicidal move.''Yes, rendezvous with us at the Following Coordinates, goodbye.'' Says Mothma.