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Osea, officially known as the Osean Federation, is a major country in the Strangereal universe. Osea is the player's home country in Ace Combat 5: The Unsung War, and an allied country in Ace Combat Zero: The Belkan War. It will also make an appearance in Ace Combat 7.

Osea is one of the main superpowers in Strangereal. The country has a history of imperialism, which left negative impacts elsewhere in the world, especially in the neighboring country of Belka and the distant Usean continent. The election of President Harling in the early 2000s led to demilitarization, lowering the country's influence, but many of these negative sentiments still remain.

Osea is one of the most developed countries in Strangereal. With assistance from their counterpart, Yuktobania, Osea is considered to be the main leader in space development, especially with their creation of the Arkbird and SOLG satellites.


Early yearsEdit

The country of Osea is known to have existed by the late 1800s, as the Osean War began in 1905.[citation needed] According to an old map of Strangereal, some modern Osean cities such as Oured and Bana City have been around for quite some time.[1]

Osean War and Cold WarEdit

Between 1905 and 1910, Osea battled with Belka in what would become known as the Osean War, the first in a series of historical conflicts between the two nations.[citation needed] Tensions led to a second war in the 1940s, ending with Osea losing an undetermined portion of its northern territory to Belka.[citation needed] Decades later, in the eighties, it saw itself involved in a Cold War with the Union of Yuktobanian Republics, birthing an arms race that caused the Osean military to develop atmospheric weapon systems under the Strategic Defense Initiative to counter Yuktobanian ballistic missiles, including the Strategic Orbital Linear Gun.[2]

During the Cold War, Osea secretly backed separatist movements in Belka in the prelude to the 1988 federal law review motivated by its economic recession, believing that underground resources existed in the newly created state of Ustio. As the Belkan government attempted to sell its own lands to surrounding countries to save their economy, it formed a joint corporation between both countries overseeing the Great Lakes region on September 1991, which rapidly collapsed after a corruption scandal revealed intentional underfunding and falsified financial reports from Osea.[3][4]

Belkan WarEdit

Main article: Belkan War

When Waldemarr Rald and the Fatherland and Workers Party gained control of the Belkan government after the December 1991 emergency election, the waves of nationalism that swept the country saw a widespread rise in anti-Osean sentiments, along with hostilities against Ustio.[4] The discovery of natural resources in Area B7R on March 1995 caused Rald to declare war on Osea and its former territories, conquering large portions of Osean territory west of the Great Lakes. The Federation joined forces with Yuktobania and Ustio to form the Coalition of Allied Forces (better known simply as the Allied Forces) and repelled the Belkan Army in April 1995 through Offensive Campaign No. 4101, allowing them to send the Third Fleet of the Osean Navy through the Futuro Canal and partake in the Ustio front.[5]

Under a treaty of non-aggression by the Assembly of Nations, Osean troops collaborated with Ustio to pierce through the Hydrian Line and invade South Belka, before nullifying the treaty on May 28 after the destruction of the Excalibur missile interceptor system. The surrender and disarmament of the Belkan south led it to launch a campaign against the country's weapons industry as a prelude to the invasion of Nord Belka. On June 3, the first Allied attacks on the north led to the nuclear disaster at the Waldreich Mountains, causing the cessation of hostilities between both sides.[6]

Two weeks after the nuclear detonations, Rald and the Allied Forces agreed to sign the formal surrender of Belka at the city of Lumen, on the Belkan side of the Great Lakes. The Treaty of Lumen declared the dissolution of the Belkan armed forces and the entrusting of South Belka to Osea as the seventh state of North Osea, as well as the acquisition of the mineral resources that were the cause of the war by the former Allies. The South Belkan Munitions Factory, a core Belkan arms manufacturer, became Gründer Industries and allowed itself to become Osean property as part of the deal.[3]

In 1996, the Osean president signed a bilateral peace treaty with Yuktobania that ended the Cold War.[citation needed] The signing caused the survivors of the Osean Air Force's Wizard Squadron to plot his assassination, but were killed or arrested by Osean Special Ops forces.[7][3]

Era of peaceEdit

"The world was once again at peace. And, thanks to them, it seemed it would last forever."
Albert Genette.

Following the signing of the 1996 treaty, Osea began a rapprochement process with Yuktobania, and focused early during the post-Belkan War years on the aftermath of the Ulysses 1994XF04 asteroid. Scientists and specialists from the two countries collaborated to deal with the fragments lingering on orbit, leading to the Arkbird spaceship being used to clear the atmosphere shortly after Ulysses' impact. Both nations formulated a plan to develop an international space station in the 2000s, being aided by Verusa and the Federation of Central Usea.[2]

On 2004, Vincent Harling was elected as the 48th President of the Osean Federation under the terms of the Yuktobanian Peace Treaty, holding an international conference with the "G7" group of nations onboard the Arkbird in August of 2008. The event saw the signing of various treaties against the proliferation of nuclear weapons with Yuktobania and other nations, including START II, the Comprehensive Nuclear Test Ban Treaty and the Treaty on the Non-Proliferation of Nuclear Weapons. After the end of his mandate, the 2008-2009 elections caused Harling to be re-elected for a second term as President.[2]

Circum-Pacific WarEdit

Main article: Circum-Pacific War

Between the Arkbird summit and 2010, the government was infiltrated by a secret Belkan group called the Grey Men to spark a second cold war as revenge for Belka's defeat, inciting nationalism against the Belkan-backed military regime that replaced Prime Minister Nikanor as the Yuktobanian head of state. A series of airspace intrusion incidents by Yuktobanian Air Force aircraft took place before the regime declared war on Osea in September 27th, 2010, triggering the Circum-Pacific War.[8] Harling's second-in-command, the patriotic Vice President Appelrouth, assumed control of the Osean armed forces after the President was kidnapped by the Gray Men in October,[9] sanctioning a full ground invasion of Yuktobania.[10]

The invasion of Yuktobania saw a rapid advance by the Osean Army, who were backed by the Wardog Squadron for the duration of the war. Shortly before the siege of Cinigrad, Wardog defected after an assassination attempt by the Gray Men[11] and launched a clandestine campaign against the Belkans from the Osean aircraft carrier Kestrel, becoming the Razgriz Squadron after rescuing Harling from an old castle in the Waldreich Mountains.[12] After their liberation, Harling and Nikanor traveled to Osea and ordered the immediate cessation of fighting in an emergency conference at Oured. On New Year's Eve, the Razgriz and soldiers from both countries besieged Gründer Industries' headquarters in Sudentor to halt the deployment of the SOLG against Osea, destroying its control systems inside the underground tunnel built by the company beneath Waldreich.[13]

On December 31, the Razgriz disappeared after intercepting the SOLG as it prepared to collide against Oured.[14] The circumstances behind the war were kept in secret by the Osean government, who then proceeded to forcibly absorb Gründer.[citation needed] On 2014, Harling announced at a conference that all information pertaining to the war would be released to the public in 2020.[14]

Osea-Erusea ConflictEdit

Main article: Osea-Erusea Conflict

At some point after the conflict, the Osean Federation found itself engaged in combat with the Federal Republic of Erusea for unknown reasons as of yet.[15]


Political StructureEdit

One of the largest nations of the Osean continent, the Osean Federation is a democratic federal state governed by a popularly elected president who assumes their position for a four-year term, following the political system of the United States. The workplace of the president is Bright Hill, built on the capital of Oured. The country is formed by six administrative regions - Burton, Glennon, Stockham, Lindsey, Rinehart and Eversole, the last of which serves as the capital district of the country.[16] The government of the country, similar to the US, includes roles such as Foreign Minister and Vice-President. Ministries include the Ministry of Science and Technology and the Ministry of Defense.[citation needed]

Similar to Yuktobania, the territory of the country spans a large portion of west Osea and both hemispheres, and is the largest country in the world. Law enforcement is carried out by local police departments in each city, above which stand the Federal Bureau of Investigation and the Central Intelligence Agency under the federal government. A major body responsible for space development is the National Aeronautics and Space Administration, which carried out the Liberty Seven Project after 1995.[citation needed]

Armed ForcesEdit

The armed forces of Osea, commonly known as the Osean Defense Forces, are formed by the Air Defense Force, the Maritime Defense Force, and the Army, the second of which contains its own Marine Corps. The main branches of the military adopted the "Defense Force" titles after the 1996 treaty with Yuktobania and retained them into the 21st century.[citation needed]



  1. File:Strangereal world old.jpg.
  2. 2.0 2.1 2.2 GAZE: Arkbird Declaration Summit 2008.
  3. 3.0 3.1 3.2 Aces At War: A History. Page not provided.
  4. 4.0 4.1 FOLLOW: September 4, 1991.
  5. Juggernaut. Ace Combat Zero: The Belkan War.
  6. The Stage of Apocalypse and subsequent cutscene. Ace Combat Zero: The Belkan War.
  7. Assault Records for Iosif Beletsky (Wizard 4). Ace Combat Zero: The Belkan War.
  8. Open War. Ace Combat 5: The Unsung War.
  9. Handful of Hope. Ace Combat 5: The Unsung War.
  10. Lit Fuse. Ace Combat 5: The Unsung War.
  11. Final Option. Ace Combat 5: The Unsung War.
  12. Ancient Walls. Ace Combat 5: The Unsung War.
  13. ACES. Ace Combat 5: The Unsung War.
  14. 14.0 14.1 The Unsung War and subsequent cutscene. Ace Combat 5: The Unsung War.
  15. Ace Combat 7.
  16. GAME Watch Impress - 「エースコンバット5 ジ・アンサング・ウォー」: "An increasingly greater view of the world"

Start a Discussion Discussions about Osea

  • Osea and it's contributions to Strangereal

    20 messages
    • That's a very incorrect statement. Yuktobania started a war with Osea, but Osea utilized its air power as well as its Arkbird and halted ...
    • Very true, very true. It's not that he didn't care about defending, it's that he believed that peace could be achieved.

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