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Erusea, officially the Kingdom of Erusea (エルジア王国),[2] is a large nation located on the westernmost part of the Usean continent. Erusea shares its border with San Salvacion and at least one other nation. Its capital, Farbanti, is located on the coast of Usea's westernmost peninsula near the Spring Sea.

Formerly the Federal Republic of Erusea[3] or Erusean Republic (エルジア共和国),[4][5] the nation was known for its industrialism, militarism, and advancements in engineering and aeronautic technologies. It was severely affected by the impact of Ulysses 1994XF04 in 1999. By mid-2003, tensions between Erusea and the other Usean nations escalated into open war, in which Erusea was soundly defeated.

By 2011, Erusea was restored into a kingdom.[6] The construction of the International Space Elevator at Selatapura[7] and increasing IUN presence on Usea caused tensions to rise with the Osean Federation.[2] This culminated in the Lighthouse War, which Erusea ultimately lost.[8]

Erusea was the antagonist country in Ace Combat 04: Shattered Skies, and made a brief appearance in Arcade Mode in Ace Combat 5: The Unsung War. It once again acted as an antagonist in Ace Combat 7: Skies Unknown.


Pre-Ulysses (–1997)

Erusea was initially a kingdom ruled by relatives of the D'Elise family. The country has a history of expansionism and frequently annexed several of its smaller neighbors, one of them being the Grand Duchy of Shilage. Despite its annexation, Erusea allowed the Shilage royalty to rule. Eventually, the Erusean royal family was overthrown, and became a federal republic.[9]

Despite the regime change, Erusea did not allow its annexed territories to regain independence and maintained its expansionist policy, later annexing the Republic of Voslage.[10] Sometime in the early 1990s, the military was deployed along the Amber-Ugellas border, which prompted the Federation of Central Usea (FCU) and the IUN to deploy their own forces to the border in response.[11] The standoff continued for a long time until April 29, 1996, when the FCU formally announced the existence of the Ulysses 1994XF04 asteroid, simultaneously pulling out its forces from the Amber-Ugellas border.[11]

Usean coup d'état (1997-1998)

Despite maintaining hostile relations with its Usean neighbors, Erusea became a member of the Usean Allied Forces,[12] a military alliance aimed to deter Osean and Yuktobanian expansionism from the continent. However, in 1997, a group of southern Usean nations announced their intention to join the Osean Federation. Many northern nations, including Erusea, protested the act. Osea extended its support and prepared to sign the Spring Sea Treaty with the southern nations. On May 30, the day the treaty was to be signed, conservative extremists—including some members of Erusea's military, such as the Albireo Squadron[13]launched a coup d'état and overwhelmed the Usean Allied Forces across the continent.[12]

Within a year, the rebels had pushed the Allied Forces to the west and controlled most of Erusea's territory, as well as that of every other country.[12] The rebels performed numerous operations within Erusean territory,[14] including taking over The Keep and converting it into a frontline supply base.[15] In March 1998, the Usean Allied Forces hired Scarface Squadron to combat the rebels.[16] Over the next three months, Scarface pushed the frontlines to the center of the Usean continent,[17] eventually restoring Erusea's sovereignty.

Post-Ulysses (1998–2003)

Farbanti Crater High-Res.jpg

Ulysses meteorites began to impact the planet on July 8, 1999, and continued to do so for the next two weeks, killing over 500,000 Useans and crippling the continent's infrastructure.[18] Despite Stonehenge's attempts to defend the continent, at least ten meteorites made impact within Erusea's borders.[19] Two of them made particularly significant craters: Goldberg Crater in the Whiskey Corridor and Ryker Crater in Farbanti, the latter of which flooded the city's western municipal district. Despite the damage, Erusea refused to move its government headquarters or change Farbanti's status as the country's capital.[20]

In the aftermath of the Ulysses disaster, millions of civilians were displaced from their residences and became refugees. Many Usean countries expected Erusea, a large country, to admit the most refugees.[19] In April 2000, after accepting over 200,000 refugees, Erusea's Ministry of Foreign Affairs announced that it would impose restrictions on visa applications, preventing more refugees from entering the country. Despite Erusea's insistence that they could not support any more refugees, other Usean countries publicly condemned the move, boycotting Erusea's products. Many refugees suffered disease and crime at mismanaged refugee camps along Erusea's borders.[19]

The rising tensions from the refugee crisis culminated in Erusea's sudden invasion of San Salvacion and capture of Stonehenge in the summer of 2003.[21] The pilots and security personnel assigned to defend Stonehenge went missing, but Erusea claimed that Stonehenge's management staff was under their protection. The member nations in the Central Usea Treaty Organization heavily condemned Erusea's act, and FCU President Robert Sinclair created the Independent State Allied Forces in the event of war. President Sinclair deployed FCU troops to the outskirts of San Salvacion and ordered Erusea to withdraw within a month.[19]

Continental War (2003–2005)

On September 14, 2003, the deadline that FCU President Sinclair gave Erusea to withdraw, the ISAF attempted to destroy Stonehenge. However, Erusea utilized Stonehenge to great effect in destroying ISAF's aircraft, forcing ISAF to retreat to Los Canas.[21] The ISAF attempted another strike operation to destroy Stonehenge, but Erusea deployed the elite Yellow Squadron, which shot down the entire ISAF strike team.[22] Erusea continued to win numerous victories over ISAF forces, pushing them off the continent onto North Point.[21] Around this time, Erusea was involved in trade deals with Yuktobania and the Republic of Anea, contributing to Erusea's military power.[23]

In the autumn of 2004, ISAF forces began to win multiple small victories over Erusean forces. Erusea initiated preparations to deploy the Aegir Fleet to North Point to end the war, but ISAF forces immobilized and destroyed the fleet in November 2004, providing an opening for ISAF to launch counteroffensive operations.[24]

Erusea began utilizing Stonehenge and Yellow Squadron against the ISAF forces as they penetrated the mainland and liberated Los Canas. In April 2004, the ISAF's Mobius 1 destroyed Stonehenge, eliminating Erusea's air superiority over the Usean continent.[25] Over the next few months, the ISAF launched a massive counteroffensive and pushed the Erusean forces back to its own territory.

Following the liberation of San Salvacion, ISAF chased Erusea's retreating forces, defeating them in the Whiskey Corridor and making a push for Farbanti. On September 19, Mobius 1 assisted ISAF's ground forces in capturing Erusea's GHQ, and shot down the entire Yellow Squadron. Erusea's Supreme Commander was killed in the battle, and Erusea surrendered to ISAF that day.[26] A rebellious group of Erusean officers captured and activated the Megalith superweapon facility in retaliation, but Mobius 1 and other ISAF forces destroyed the facility.[27] Similar remnant Erusean forces continued fighting for at least a month.[28]

Interwar period (2005–2019)

Following their defeat, Erusea's military was reorganized so that it would only support the minimum capabilities required for self-defense. To compensate, Erusea acquired Belkan[29] UCAVs from North Osea Gründer Industries[30] and, by 2006, was involved in arms trading with at least one member nation of the proposed Republic of Anea Initiative.[31] Throughout the postwar period, Erusea continued to cede territory to other countries. Among these were the Gunther region, which became an IUN trust territory[32] and the Erusean city of Selatapura, which became an independent nation.[33]

In 2006, while the ISAF attempted to implement a new autonomous government within Erusea, a rebellious group calling itself Free Erusea captured ISAF facilities and began terrorist operations across the Usean continent, as far east as Newfield Island. On September 24, 2006, Mobius 1 was deployed to quell the rebellion.[23] In less than three months, Mobius 1 defeated Free Erusea, allowing the ISAF to continue setting up Erusea's provisional government.[34]

2008 G7 Summit aboard the Arkbird

On August 21, 2008, the G7 Summit took place aboard the Arkbird. Erusea's provisional government was in attendance on Osea's invitation, in hopes to solve the outstanding issues regarding Erusea's military and the Usean refugees.[35]

Erusea's interim government eventually restored the previously deposed monarchy to power by 2011.[6] In the same year, the Osean Federation's Harling administration made the decision to build the International Space Elevator at the city-state of Selatapura, a decision that was protested by the Erusean government due to the chosen location being former Erusean territory.[7]

After two Erusean kings passed away,[6] by blood relation, Rosa Cossette D'Elise became the new Princess of Erusea when her father became the new King of Erusea.[36] Following an audience with the King and other heads of state, Princess Cossette gave a speech to a crowd of 100,000 Erusean citizens.[37] She became an outspoken representative for Erusea in her new role.[2]

On April 4, 2012, the military magazine FRONT LINE released a publication on the Yuktobanian submersible aircraft cruiser Alicorn, speculating that Erusea, Leasath and Estovakia were the candidates most likely to purchase the vessel.[38] Despite its reorganisation, Erusea continued to rebuild its military further, ultimately purchasing the Alicorn from Yuktobania via GR Trading to bolster the Erusean Royal Navy.[39]

In January 2013, the first ISEV cable transportation rocket was launched from Comona[7] as Osea continued to reassign more Defense Force units to Usea as IUN peacekeeping units.[32] As construction continued throughout the following years, Erusea and its allies became increasingly frustrated with the environmental damage caused by the space elevator's construction and the aggressive actions of the IUN peacekeeping forces. Clashes between protestors and peacekeeping forces occurred as mass demonstrations erupted within Erusea, calling for ties with Osea to be severed.[32] Within the military, a group of young nationalistic officers called for war and convinced the Erusean royal family that Osea's intent was to control the continent.[29]

Lighthouse War (2019)

On May 15, 2019, the Kingdom of Erusea initiated a war against the Osean Federation and Usean nations hosting IUN peacekeeping forces, using MQ-99 UCAVs to strike multiple ports on the Osean mainland and sinking several Osean aircraft carriers. Across Usea, the Erusean Air Force conducted air raids on IUN-PKF and Osean bases.[40] Additionally, Erusea managed to hack into around half of Osea's satellite network. Shortly afterward, Erusea seized control of both the International Space Elevator and the Arsenal Birds meant to defend it. In response, the Osean aircraft carrier Kestrel II launched two unsuccessful attacks on the Erusean capital of Farbanti, accidentally causing civilian casualties and resulting in international condemnation of Osea's actions.[40]

Subsequently, Erusea gained control over most of Usea. In an attempt to mount a counteroffensive, Osea attempted to gain air superiority at Chopinburg, but ultimately failed due to Erusea utilizing one of the captured Arsenal Birds.[41] On June 6, Osea attempted to rescue its former president, Vincent Harling, who was hiding at the space elevator since the war broke out. During the operation, Erusea used an aircraft posing as an Osean fighter to assassinate Harling.[29][42]

Osea utilizing Stonehenge to shoot down Arsenal Bird Liberty

In August, Osea launched a surprise attack and sank the Erusean Royal Navy's Njord Fleet stationed at Snider's Top, significantly weakening Erusea's naval capabilities.[43] Furthermore, the Osean forces utilized Stonehenge to shoot down Arsenal Bird Liberty', which drastically reduced Erusea's air superiority.[44] With the loss of both the Njord Fleet and an Arsenal Bird, Erusea commissioned the Rán Fleet and Yuktobanian-built Alicorn to bolster their forces. Ultimately, both were sunk by the Osean Defense Forces on September 10 and 14 respectively.[45][46]

Osean forces then captured an Eursean base at Cape Rainy,[47] which they used as a base to launch Operation Giant's Step on September 19, where Osea captured Farbanti and the King of Erusea was killed.[48] Concurrently, Erusea eliminated Osean satellites in orbit while Osea also destroyed the satellites that Erusea had hacked earlier in the war, throwing the entire Usean continent into chaos and sparking an Erusean civil war.[49] Amidst the chaos, numerous states previously annexed by Erusea, including Shilage, declared independence.[50]

On October 1, with communications down, Osea's Long Range Strategic Strike Group attempted to escort Erusean Army General Édouard Labarthe, who wished to cooperate with Osea and oust the radical faction within the Erusean military prolonging the conflict. However, the Erusean Radicals transferred falsified information to Osean Air Force AWACS Argus, leading to Labarthe being mistakenly killed by an Osean F-16C.[29] On October 31, a coalition of Erusean conservative forces and Osean military launched a joint operation around the International Space Elevator that resulted in the destruction of the Arsenal Bird Justice.[51] The following day, coalition aircraft engaged two ADF-11F Ravens that were attempting to transmit flight data to drone manufacturing plants across Usea via the space elevator's communication systems. Ultimately, the two drones were shot down by Trigger.[8]

In December 2019, during the Expo City Conference, Erusea signed a peace treaty with Osea which officially ended the Lighthouse War.[52]

Postwar (2019–)

Erusean aircraft at Redmill showcased alongside those from other nations

Following the Lighthouse War's conclusion, a majority of the Erusean public expressed support for Princess Cossette becoming the next monarch. However, as Erusea does not currently recognize female heads of state, the selection of the next King became a pressing issue for the nation.[53]

In January 2020, Erusea signed a mutual nonaggression pact with Osea at a meeting in North Point.[54]

On June 30, Osea invited Erusea to participate in a ceremony on Memorial Day 2020 commemorating 25 years since the Belkan War's conclusion. The Erusean Air Force sent multiple aircraft to Redmill, including replica Yellow and Sol squadron aircraft. In addition to Erusea, Osea also invited Yuktobania, Emmeria, Estovakia, Leasath, Aurelia, Ustio, Sapin, Central Usea, and Belka to participate in the event.[55]



Outside of wartime holdings, Erusea possesses a large majority of Usea's northwestern territory. Most of Erusea's north and central areas are covered by the Lambert and Amber Mountains, respectively. Situated between the two mountain ranges is the Whiskey Corridor, a strip of desert land that used to have the Irsali River flowing through it. Goldberg Crater, the largest of the Ulysses craters, is located next to the dried-up river.[20]

Erusea's capital city, Farbanti, is partially constructed by man-made landfills.[26] Its westernmost district was flooded by the Ulysses meteorite that created Ryker Crater.[20] Erusea's territory also includes Cape Rainy to the north, the strategic port city Anchorhead to the south, and the Twinkle Islands south of Farbanti.

The Gunther region belonged to Erusea but had to be relinquished as a trust territory to the IUN after the Continental War.[56]



From which source, Brigadier General?
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Erusea was first structured as a kingdom. The monarchy was later overthrown and became a federal republic by the 1990s.[9] The republic was led by a military Supreme Commander,[26] who held the most sway in government proceedings, but Erusea still maintained a parliament for legislative duties.[57] The republic's political environment was described as fascistic by the Side Story Narrator and ISAF forces.[58] These statements are supported by Erusea's expansionism[9] and use of secret police forces in the countries it occupied during the Continental War, such as San Salvacion.[58]

By the 2010s, Erusea reformed back into a kingdom during its period of reconstruction. Princess Rosa Cossette D'Elise and her family, despite being viewed as commoners, ascended to the throne by blood relation to the former monarchy.[36]


All right, gentlemen, it's time to clean house!
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Erusea boasted a powerful military in the 1990s and early 2000s, described as equivalent to the military power of all of ISAF's member states combined.[19] Military service is mandatory for its citizens.[9] Its air force played host to many ace pilots, including Edgar Grint[13] and Yellow 13.[59] The Erusean navy was best represented by the Aegir Fleet, repeatedly described as the "invincible fleet" prior to its sinking.[24] Erusea continued to maintain some naval power afterward,[26] but its strength post-2005 is unknown. The Erusean military also appears to have a tactical espionage branch, whose operatives were responsible for disabling ISAF's early warning radar network during the Continental War and the elimination of an Osean survey team during the Lighthouse War.

The height of Erusea's military power came with its capture of Stonehenge in 2003. While in control of the facility, Erusea shot down innumerable ISAF aircraft, preventing the ISAF from providing air support to its ground troops.[60] Stonehenge's destruction proved to be a crippling blow to the Erusean military.[25]

Erusea's Air and Space Administration (EASA) is recognized as a major scientific element of Erusea's military. The EASA attempted to manufacture the X-02 Wyvern before the conclusion of the Continental War, but political disagreements and wartime supply exhaustion prevented its completion before the war's close.[57] In later years, the EASA would continue to be a major part of Erusean military development, performing research into UAV technology.

During the 2019 conflict with Osea, Erusea captured the International Space Elevator, the Arsenal Birds and their MQ-101 UAVs, giving Erusea power across a large portion of the Usean continent. However, despite early gains in the war, Osean counterattacks would result in the loss of northern portions of the nation. Eventually, Osean forces would capture Farbanti, but the anti-satellite attacks conducted by both Osea and Erusea would cut off all communications between their forces. Without any support and blaming each other for the fall of Farbanti, the government collapsed, with pro-peace conservatives and pro-war radicals and various independence movements vying for control. Eventually, Osea retook the Space Elevator, but allowed Princess Cossette to form a provisional government based at the Elevator to help Usean refugees fleeing the continuing civil war.



  • Erusea going from a Kingdom to a Republic and then back to a Kingdom in a relatively short time is likely inspired by France between 1791 and 1870, which went through ten similar regime changes in that time period.
  • Relationship between the monarchy and the radicals is somewhat similar to that of fascist Italy.
  • Their military equipment is primarily of Soviet/Russian origin.
  • The demonym for people and things related to—or hailing from—Erusea is inconsistent throughout the series. Due to it being the most recent and up-to-date source, this article assumes Ace Combat 7: Skies Unknown to be correct.


  1. Aces At War: A History 2019, page 027.
  2. 2.0 2.1 2.2 Cutscene 03: "444th Air Base", Ace Combat 7: Skies Unknown.
  3. Name and description of "Federal Republic of Erusea" Ace Combat Infinity emblem.
  4. Aces At War: A History, page 119.
  5. Briefing, Final Countdown, Ace Combat: Assault Horizon Legacy.
  6. 6.0 6.1 6.2 "Rose". Aces At War: A History 2019, pages 128—133.
  7. 7.0 7.1 7.2 Usea Reconstruction: Space Elevator Nearing Completion.
  8. 8.0 8.1 Mission 20: "Dark Blue", Ace Combat 7: Skies Unknown.
  9. 9.0 9.1 9.2 9.3 Cutscene 06: "The Rose Emblem", Ace Combat 7: Skies Unknown.
  10. Voslage emblem description, Ace Combat 7: Skies Unknown
  11. 11.0 11.1 Usea Today: Asteroid on Collision Course With Earth! Retrieved on June 18, 2017.
  12. 12.0 12.1 12.2 Intro cutscene, Ace Combat: Assault Horizon Legacy.
  13. 13.0 13.1 Final Countdown, Ace Combat: Assault Horizon Legacy.
  14. Easy Money, Ace Combat: Assault Horizon Legacy.
  15. Tin Castle, Ace Combat: Assault Horizon Legacy.
  16. Gambit, Ace Combat: Assault Horizon Legacy.
  17. Cuckoo's Nest, Ace Combat: Assault Horizon Legacy.
  18. Ace Combat 04: Shattered Skies - Perfect Guide, page 007.
  19. 19.0 19.1 19.2 19.3 19.4 GAZE: War? Retrieved on June 18, 2017.
  20. 20.0 20.1 20.2 Color of the World: Craters. Retrieved June 18, 2017.
  21. 21.0 21.1 21.2 Aces At War: A History, page 136.
  22. The World of AC04. Retrieved on June 18, 2017.
  23. 23.0 23.1 ISAF Bulletin. Retrieved on June 18, 2017.
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  25. 25.0 25.1 Stonehenge Offensive, Ace Combat 04: Shattered Skies.
  26. 26.0 26.1 26.2 26.3 Siege of Farbanti, Ace Combat 04: Shattered Skies.
  27. Megalith, Ace Combat 04: Shattered Skies.
  28. "A Brother in Arms / 1", Ace Combat Zero: The Belkan War.
  29. 29.0 29.1 29.2 29.3 Mission 16: "Last Hope", Ace Combat 7: Skies Unknown.
  30. Aces At War: A History 2019, page 127.
  31. ISAF Bulletin
  32. 32.0 32.1 32.2 Aces At War: A History 2019, page 76.
  33. Aces At War: A History 2019 (Japanese & Chinese editions), page 99.
  34. Arcade Mode, Ace Combat 5: The Unsung War.
  35. GAZE: Arkbird Declaration Summit 2008. Retrieved on June 18, 2017.
  36. 36.0 36.1 Aces At War: A History 2019, page 105.
  37. Aces At War: A History 2019, page 01.
  38. FRONT LINE: Unneeded Submarine To Be Scrapped
  40. 40.0 40.1 Mission 01: "Charge Assault", Ace Combat 7: Skies Unknown.
  41. Mission 03: "Two-pronged Strategy", Ace Combat 7: Skies Unknown.
  42. Mission 04: "Rescue", Ace Combat 7: Skies Unknown.
  43. Mission 11: "Fleet Destruction", Ace Combat 7: Skies Unknown.
  44. Mission 12: "Stonehenge Defensive", Ace Combat 7: Skies Unknown.
  45. SP Mission 02: "Anchorhead Raid", Ace Combat 7: Skies Unknown.
  46. SP Mission 03: "Ten Million Relief Plan", Ace Combat 7: Skies Unknown.
  47. Mission 14: "Cape Rainy Assault", Ace Combat 7: Skies Unknown.
  48. "Tyler Island", Ace Combat 7: Skies Unknown.
  49. Mission 15: "Battle for Farbanti", Ace Combat 7: Skies Unknown.
  50. Mission 18: "Lost Kingdom", Ace Combat 7: Skies Unknown.
  51. Mission 19: "Lighthouse", Ace Combat 7: Skies Unknown.
  52. Aces At War: A History 2019, page 77.
  53. "The New System", Ace Combat 7: Skies Unknown.
  54. Aces At War: A History 2019, page 126.
  56. Aces At War: A History 2019, pages 23 and 76
  57. 57.0 57.1 Erusea's Last Hope. Retrieved on June 18, 2017.
  58. 58.0 58.1 Emancipation, Ace Combat 04: Shattered Skies.
  59. Interlude 04, Ace Combat 04: Shattered Skies.
  60. Introduction cutscene prior to Sitting Duck, Ace Combat 04: Shattered Skies.