- This article is about an in-universe event. For the in-game mission, see ACES.
- "We're gonna fight together, and we're gonna come home together. Don't you forget that!"
- ― Unnamed Yuktobanian Army soldier
The Battle of Sudentor was one of the final battles of the Circum-Pacific War. It was fought between a coalition of Osean-Yuktobanian forces and the Belkan Gray Men (supported by some Osean and Yuktobanian warmongers).
In the final weeks of 2010, the Razgriz Squadron partook in a series of clandestine operations against the Gray Men in Belka and Yuktobania, freeing Osean president Vincent Harling and Prime Minister Seryozha Viktorovich Nikanor, transporting them to the aircraft carrier OFS Kestrel. In December 29, the ship was sunk after a battle between Yuktobanian and Osean vessels that birthed a new battle group from ships of both nations. 
Following Nikanor's liberation from the Shtil Prison, Yuktobanian resistance member Major Nastasya Vasilievna Obertas provided the Kestrel's crew with a disc with encrypted information of the V2 missile, which the Gray Men intended to load into the Strategic Orbital Linear Gun (SOLG) satellite, secretly completed after its cancellation in the Belkan War, to use as leverage in their goal of reuniting the Belkan Federation. 
Transmissions from the Belkan operative Schenze were traced by the communications ship OFS Andromeda to an underground facility built by Gründer Industries in the North Osean city of Sudentor, developed with the true purpose of facilitating the Belkan reunification, that housed a computer network designed to remotely control the SOLG from the earth. Razgriz took off from the Kestrel before it sank and flew to Sudentor to attack the tunnel. 
The Oured conference
- "This is President Harling of the Osean Federation. Attention, all Osean and Yuktobanian officers and soldiers currently on the battlefield. Let us put down our guns and come out of the trenches. The Osean capital of Oured has been freed of the people who took advantage of my absence to usurp control of the country. Once robbed of my freedom and of my ability to do the right thing, I now stand again under the light of the golden sun, and I do so with the honorable Yuktobanian Prime Minister Nikanor by my side. We have resolved our terrible and unfortunate misunderstandings, and the war is now over."
- ― Vincent Harling speaking in Oured
- "This is Prime Minister Nikanor, head of government for the Union of Yuktobanian Republics. Attention, all officers and soldiers of Osea and Yuktobania currently on the battlefield. Please watch as President Harling and I stand shoulder to shoulder, hand in hand. President Harling’s words are true. The war is over, but there is one more battle that still needs to be fought."
- ― Seryozha Viktrovich Nikanor speaking in Oured.
Prior to the sinking of the Kestrel, her captain, Nicholas A. Andersen, advised Nikanor into issuing an order to halt the ongoing war between Osea and Yuktobania along with Harling, who had departed with the Sea Goblin special forces team to Oured in order to reclaim his government. Following his command, the minister left for the capital and met up with Harling to organize an emergency summit in the capital, which was broadcasted live to both leaders' nations. 
At 22:00 on December 30, the conference opened with Harling issuing a global order to all units of the Osean and Yuktobanian military to cease fighting immediately, citing his intention to reclaim control of Osea from Vice President Appelrouth. His message was replicated by Nikanor, who called for a general surrender of commanders from both sides, demonstrating his willingness to end the Circum-Pacific War by handshaking Harling on live television. 
Harling revealed the threat of the SOLG to the public, declaring that both nations were facing a potential disaster, but assuring that the nation targeted by the satellite was uncertain. He then urged both armies to direct their troops to Osea, where a "final" battle remained to be fought with Belka. The conference was transmitted by reporters and networks from across the world, including the OBC and Yuktobania's SBN. 
The reception to the message varied throughout Osea and Yuktobania. Many soldiers from various branches complied to their command and set course towards Sudentor, with both factions forming an international alliance. A second group refused to abide and continued to battle their perceived enemy, while hundreds of troops doubted the veracity of the transmission, including Yuktobanian soldiers entrenched in Cinigrad, which had endured a failed siege by Osea. 
Attack on Sudentor
- "Don't worry about the Yuke fighters! Get the Wardog ghosts. Follow me! We're going to put an end to all wars once and for all!"
- ― Allen C. Hamilton
The conference led a large number of troops from both countries travel to North Osea to stage a siege on Sudentor. Osean Air Defense Force and ground forces formed a large part of the newly formed coalition, in conjunction with divisions of the Yuktobanian Air Force. Anticipating the attack, Gründer Industries offered the last of the three V1 nuclear weapons stolen from Mount Schirm to hardliners of the two countries, led by Sand Island Air Force Base officer Allen C. Hamilton. 
By midnight, the coalition forces entered the city from the south and west. Minutes before the siege began, the Osean government ordered a general evacuation of civilians from the city to emergency shelters, who were given advice by local newscasters to inform the invaders of their allegiance. 
The Razgriz Squadron arrived minutes after the start of the invasion, who allied themselves with the Yuktobanian 703rd Squadron after a brief encounter. Their force grew into a squadron of over a dozen pilots from both countries, who sung the song "The Journey Home" in a sign of unity. Several aircraft joined the coalition force, including Yuktobanian AWACS operator Oka Nieba, who assisted Razgriz by relaying messages of Wolfgang Buchner from the Andromeda. 
- "Where's Hamilton?"
- ― Kei Nagase
- "He's dead. Hit by a ricocheting plane."
- ― Hans Grimm
Before the tunnel was opened, the Major's disk was further decoded, revealing not one, but two core systems. Furthermore, the special forces team could not keep the entrance open for long. Because of this, a second aircraft had to destroy the core on the northern end of the tunnel. The Razgriz Squadron entered the tunnel in the southern end to destroy the first core system. Major Hamilton entered the tunnel, following the Razgriz, in an attempt to shoot them down. Jack Bartlett soon entered the tunnel's northern opening to destroy the second core. Once both cores were destroyed, the Razgriz and Bartlett flew past each other head on. The former was later attacked by fighters that were chasing the latter and in the process, one of the fighters struck Hamilton head on, killing him. The Razgriz soon escaped when the tunnel exploded. 
The destruction of the cores ceased the SOLG's attacks on the Sudentor area, but also had the effect of triggering the automatic deorbit of the SOLG six hours and forty-five minutes later. The SOLG was destroyed over Oured eight hours later, ending the Circum-Pacific War.