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The Unfathomable Fortress is the fifth mission of the Allied Campaign in Command & Conquer: Red Alert 3.


Good show, Commander! Bloody well done!
- Bingham at the briefing's start.

The successful conclusion to the first joint operation of the Allied and Soviet forces was a turning point in the war with the newly emerging Empire of the Rising Sun. While there was no doubt that the cooperation between the two former enemies had given them a key victory in not only freeing the Assault Destroyer fleet in the western Mediterranean, and had driven the Empire outside the harbour of Gibraltar, there were still murmurs of discontent and wariness between both sides.

Nevertheless, both Premier Cherdenko and Field Marshal Bingham were pleased with the success of the mission with the Premier of the Soviet Union, very happy that his Allied counterpart gave good praise to their folk hero, the elite sniper Natasha. Bingham assures Cherdenko that Natasha's services will still be needed for their next operation in the North Sea.

Bingham then informed the Allied Commander that they had recently discovered the wreck of a Shogun Battleship of the Imperial Navy. Scans had indicated that its still functioning data banks had schematics and information on the Floating Fortress in the North Sea, which may reveal its weaknesses.

This meant that the only chance their combined forces had, was to salvage the data from the sunken ship and get whatever information they had so the Allied-Soviet alliance could immediately strike the Imperial Floating Fortress and their forces with their proverbial pants down.

The Allied Commander was more than ready for the task as he knew that if they didn't get to that data first, then the Empire would send forces to either salvage the ship or destroy it to prevent their side from getting the information. However, he still kept a wary eye on his Soviet 'comrades' for not forgetting the advice and warnings handed to him by Eva McKenna and Special Agent Tanya.

"Their Loss, Our Gain"

The Allied Salvage Ship, protected by Hydrofoils and Dolphins

The Allies sent a Salvage ship to the location of the sunken Shogun Battleship to recover the information. While the salvage operation was underway, the Imperial army sent Chopper VXs and Naginata Cruisers to stop them.

A group of Hydrofoils, dolphins, Bullfrogs, and Stingrays guarded the Salvage ship. The Hydrofoils jammed the Naginata Cruiser's weapons and shot down the Chopper VXs. The intel was recovered and was analyzed, giving the joint strike force a fighting chance against the massive fortress.

Objective: Radar Boat Alpha

It is cowering behind that Power Plant like child!
- Natasha Volkova detecting the first Radar boat.

According to data salvaged from the Imperial ship, the Empire used Radar Boats that acted as an early warning system for the fortress itself, helping coordinate the Wave-Force triguns of the Floating Fortress, allowing them to easily destroy the invasion force from afar.

The first Radar Boat

Natasha and a team of Allied Spies set out to sink the first Radar boat. Defender VX Turrets were guarding the boat, so the Spies infiltrated the Instant Generators nearby to power them down and allow Natasha to call in airstrikes on the Generators and destroy the VX Turrets. They repeated this process until Natasha got close enough to target the Radar Boat. The ship was promptly destroyed by an airstrike.

Objective: Radar Boat Beta

Tanya and four Soviet engineers came to the second island, where the second Radar Boat positioned. Tanya mowed down all the Imperial Warriors and Tankbusters guarding the nearby Generators, cutting off power to the Wave-Force towers guarding the Radar Boat. The Soviet Engineers proceeded to capture the Generators one by one, and eventually all the Wave-Force Towers were without power. Tanya swam out to the Radar Boat and blew it out of the water. The fortress' Wave-Force tri-cannons were now rendered blind.

The second Radar Boat

A Titanic Naval Warfare

With their long-range artillery offline, the Imperial forces were unable to stop the Allied and Soviet MCVs from moving in and establishing a base. However, the commander of the fortress, Naomi Shirada herself, soon sent a small fleet of Shogun Battleships and Naginata Cruisers to destroy the Allied and Soviet bases.

The Allied forces still lacked powerful naval units to combat the Empire's naval forces at this point, but they managed to buy themselves some time by jamming the weapons of the Imperial ships with Hydrofoils while the Soviets sank them with Twinblades. Due to heavy losses, Dreadnoughts, Aircraft Carriers and Century Bombers were made available.

The End of the Fortress

The King Oni Guards

The King Onis, along with some were Wave-Force Towers, were guarding the only way onto the fortress. However, they were easily dealt with by the Allied's Aircraft Carriers.

Objective: Power Core Alpha

A Twinblade delivered an engineer to the first Power Core after Aircraft Carriers blew the King Onis guarding it to smithereens. The Engineer captured the part, setting a timer to capture the second Power Core. This was a very happy moment for the USSR and its leading council, under Cherdenko who says his words to the Commander at the end of his battle.

Objective: Power Core Omega

After the Soviet Engineer captured the Power Core to the north west, a Century Bomber para-dropped an Allied Engineer in front of the other Power Core, destabilizing it too before the automatic repair system of the fortress can repair the damage done to Core Alpha.

The Allied and Soviet Navies evacuated the area before the fortress exploded violently, having both of its Power Cores overloaded. Soon, the greatest weapon in the Empire's arsenal was sent to the bottom of the ocean.

The Power Core explodes

Excellent work, Commander! I've no doubt that our coalition might be... successful?
- Cherdenko praising the commander at the end of the mission


With the Floating Fortress destroyed, the Allies could now reopen their shipping routes to America and Canada. At the same time, this defeat was a great embarrassment to the Empire, as these iconic fortresses cost a fortune in yen, and also resulted in the Empire shelving plans for an invasion of America, not to mention the fact that they had to pull out of the Atlantic and Indian oceans.

The premier then contacted the Allies about what Ackerman planned to do to Moscow.


The player has to work with the soviets to defend a boat from the imperial air and sea armadas with the hydrofoils, dolphins, bullfrogs and stingrays.

Afterwards the player must use spies to infiltrate the imperial defenses and have natasha destroy the radar boat.

The next part involves tanya escorting a couple soviet combat engineers to make the next radar boat vulnerable. Beware of the wave force towers and the naginata cruisers near the radar boat.

Finally the player and his soviet co-commander must build up a strike force to attack the imperial floating fortress. After repelling the shogun battleships the new units are the apollo fighters, century bombers and the aircraft carrier. Build assault destroyers, hydrofoils, riptide ACVs, carriers and dolphins to attack the imperial navy. Establishing a land base is important due to without engineers the main objective cannot be completed and the boot camp cannot be built on water.


Red Alert 3 Missions
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