Egg Fleet

The Egg Fleet is a massive, aerial assault force consisting of dozens of vessels, all based off sea creatures. The fleet was created by Dr. Eggman and is currently the primary attacking force of the Eggman Empire. The Egg Fleet was responsible for the complete destruction of Knothole Village.

Development
Since Dr. Eggman's arrival in the prime universe, he had suffered consecutive defeats at the hands of Sonic the Hedgehog and the Freedom Fighters. After years of enduring "war games", Eggman finally began the construction of the Egg Fleet, a force which would ultimately destroy his enemies and secure his rule over Mobius. After months of construction, the fleet was finally completed. (StH: #162, #175)

Major Assault
With the location of the Kingdom of Knothole known to him, Eggman dispatched the entire Egg Fleet. He had his nephew Snively distract the Knothole Freedom Fighters by attacking Freedom HQ, transporting many of them to the Egg Grape Chambers. Meanwhile, the Egg Fleet homed in on the kingdom and began its assault. Without any defence against the aerial bombardment, everything within Knothole was destroyed, including the Lake of Rings, Castle Acorn and even Uncle Chuck's Chilidog stand. (StH: #175)

With the help of NICOLE, Amy Rose, Tails and Knuckles, Sonic was able to rescue the citizes from the Egg Grape Chambers, relocating them all to the nanite city, rechristened New Mobotropolis. The city was protected by an energy barrier, which kept it safe from all outside forces. Eggman had Snively control the Egg Fleet and attack the city, though its protective shield was able to withstand their constant attack. (StH: #177)

The Egg Fleet came under attack by Snively's step-sister Hope, who had flow in on her recently-created airplane. Her craft was only able to cause superficial damage to some of the ships in the fleet, but Snively hesitated to shoot her down, possibly allowing her to escape. After Eggman was defeated by the Freedom Fighters, he withdrew from New Mobotropolis, along with the Egg Fleet. (StH: #177)

Later, the fleet was destroyed by the new Enerjak once he had broken free from the Egg Grapes. (StH: #183)

Background Information
The Egg Fleet is based off its video game counterpart, featured in the game Sonic Heroes. All of the vessels are based off various sea creatures.