This article is about an in-game mission. For the in-universe event, see Operation Siren's Song.

Fleet Destruction is the eleventh campaign mission of Ace Combat 7: Skies Unknown. The player must attack two enemy supply bases and the Njord Fleet.


Trigger, Count, we've received official confirmation about what we're supposed to do with you. The company commander has made it clear he'd like you both to officially join our squadron. This is an unprecedented move. It seems like you've got some people looking out for you. Still, I think it's because of how you've conducted yourselves. I believe you'll be an asset to us. Okay, time for your briefing. For a long time, our counteroffensive has been overpowered by the Erusean drones' auto-intercept system. If a craft enters their airspace and doesn't respond to their IFF, drones automatically take off and move to intercept their target. However, we've discovered that the system has a blind spot. We have acquired this valuable information by sending our other squadrons on dangerous missions to scout in the whole area and initiate combat. Of all the pilots assigned to us only two managed to survive the mission. If we don't act now before the enemy can fill in the blind spot, those pilots will have sacrificed themselves for nothing. So, we've been ordered to carry out a long-range strategic strike. Operating separately from the main forces as the Long Range Strategic Strike Group, we've been developing a strategy in secret. Cyclops Squadron and Strider Squadron will sortie deep into Erusean territory and will be carrying out... specialized long-range attack strategies. You will carve your way through the territory from the north to the capital of Farbanti, attacking important targets along the way. The first operation will involve striking the enemy's main naval force, the Njord fleet, which is gathered in Northern Usea. We've known for some time that there's a large supply base utilized by the enemy fleet in the waters around Snider's Top. At present, the enemy fleet is concentrated there. Naturally, they intend to attack Eastern Usea where Osean forces are stationed. If we can surprise the enemy with a long-range attack, we could potentially do devastating damage to them. Still, it's highly likely that their advanced fleet is prepared and has started to move,[note 1] so combat with the enemy is probably unavoidable. We've verified the existence of a large supply base in the sea, as well as a medium-sized one in a valley by an estuary. It's a wide operation area, and there are a number of places you can expect large-scale combat, so we've set up a return line for replenishing supplies. Use it proactively. Any time you feel the need to stock up on ammo or make repairs to your craft, it's there. While aircraft and ammo can be replaced, the lives of our pilots cannot. We don't want any casualties out there. Remember that. The counterattack has begun. Brace yourselves!


The player must attack enemy forces and earn at least 28,000 points by attacking the supply bases, ships and aircraft. Scoring 28,000 points when the time limit ends completes the mission.

Enemy Lists

We've still got some work for you, too, so don't slack off now.
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Special Units

Unit Points Notes
Icon-AirEnemy Su-33 "IBIS" 1,500 [note 2]
Icon-AirEnemy Rafale M "CHASSEUR" 1,500 [note 3]


The mission was a success. You did more to hobble the enemy's sea power than we first expected. Outstanding work. This should free up our allies who have been bogged down on the east coast. In addition, this success allows us to finally move on and initiate the operation to shoot down the Arsenal Bird. We have a long road ahead of us. Get some rest while you can.

S Rank

Score 40,000 or more from destroying targets in the mission. Once reached, AWACS Long Caster will compliment the squadrons, commenting that "the new recruits certainly pulled their weight too".


  • Completely destroying both the sea and valley supply bases results in a line from AWACS Long Caster that references Italy, despite the fact that the country does not exist in Strangereal. "Well done. That takes care of both of the platforms. But best of all, we've taken zero losses. Stay alive people. Which is why I've taken the liberty of ordering dinner for you guys from the nice Italian bistro near the base."


  1. The subtitles incorrectly say "is prepared and has started to move". The briefing officer says "are prepared and have started to move".
  2. The player must have completed this mission at least once, and must be playing on Normal difficulty or higher. Fly through the gap in the northern platform. IBIS spawns near the eastern fleet and proceeds to flee north.
  3. The player must have completed this mission at least once, and must be playing on Normal difficulty or higher. Destroy all aircraft on the northern platform before they take off. CHASSEUR spawns to the west.