Fondor shipyard assault

The Battle of Fondor (also known as the Fondor Shipyard Assault) was an event that took place during the Galactic Civil War that led to the destruction of a prototype Star Dreadnought.

Background
Following the success at the Battle of Dubrillion, Wedge Antilles and Rogues 2 and 3 flew three stolen TIE Hunters and were assigned to pose as Imperial pilots escorting a "captured" Rebel transport to the Fondor shipyards.

In reality, the transport was empty, and was programmed to crash into a shield generator command deck to allow more Rebel fighters into a shipyard, in which a unique Super Star Destroyer with advanced cloaking device technology was under construction.

The battle
The plan didn't exactly work out as well as they thought it would, and they were discovered as Rebels, however, the command center was still successfully destroyed by the transport.

Assault on the Super Star Destroyer
The frigate Redemption and several other squadrons, and 2 CR90 corvettes arrived to cover the attack on the generator. The generator was deactivated by Wedge’s ion cannons, but he abandoned his TIE for a more stable A-wing.

He blasted the inner generator to bits, shutting down the shield. More squadrons then arrived, covering Wedge as he moved into the entrenched structures on the ship. Wedge and the others flew through the trenches, destroying the three cloaking devices installed in the ship, and wiping it out.

Aftermath
Though this was a clear victory, the Emperor believed it would make the Rebels overconfident in the upcoming battles. Even then, the Rebels were being lured into a trap.