Question: Ingsoc was an ideology that was used by the people who were living in what fictional land in 1984?

Context paragraphs:
Midcyru: Midcyru is a fictional land and is the setting for events that take place in The Night Angel Trilogy.  The landscape is composed of many of the normal elements you would find in any natural realm.  There is a main body of land, where most of the story takes place, as well as a few outlying islands.  Midcyru is split into several small countries each with its own unique peoples, religions, magics and so on. .

Newspeak: Newspeak is the language of Oceania, a fictional totalitarian state ruled by the Party, who created the language to meet the ideological requirements of English Socialism (Ingsoc).  In George Orwell's world of "Nineteen Eighty-Four", Newspeak is a controlled language, of restricted grammar and limited vocabulary, a linguistic design meant to limit the freedom of thought—personal identity, self-expression, free will—that ideologically threatens the régime of Big Brother and the Party, who thus criminalized such concepts as thoughtcrime, contradictions of Ingsoc orthodoxy.

Ingsoc: Ingsoc (Newspeak for "English Socialism" or the English Socialist Party) is the political ideology of the totalitarian government of Oceania in George Orwell's Dystopian novel "Nineteen Eighty-Four".

Mistress Masham's Repose: Mistress Masham's Repose (1946) is a novel by T. H. White that describes the adventures of a girl who discovers a group of Lilliputians, a race of tiny people from Jonathan Swift's satirical classic "Gulliver's Travels".  The story is set in Northamptonshire, England, just after the Second World War (someone wants to talk to Churchill, but it is revealed Clement Attlee is the PM); in one chapter Maria plays at being General Eisenhower greeting grateful subject peoples.  Yet there is also a strong flavour of the 18th century, both the fictional land of Lilliput and the British Empire of Swift, Gibbon, and Pope.  Imperialism, and the need for self-governance, is a major theme in the novel.

Brobdingnag: Brobdingnag is a fictional land in Jonathan Swift's satirical novel "Gulliver's Travels" occupied by giants.  Lemuel Gulliver visits the land after the ship on which he is travelling is blown off course and he is separated from a party exploring the unknown land.  In the second preface to the book, Gulliver laments that this is a misspelling introduced by the publisher and the land is actually called Brobdingrag.

Tin Woodman: The Tin Woodman, better known as either the Tin Man or (incorrectly) the Tin Woodsman (the third name appears only in adaptations, the first—and in rare instances, the second—was used by Baum), is a character in the fictional Land of Oz created by American author L. Frank Baum.  Baum's Tin Woodman first appeared in his classic 1900 book "The Wonderful Wizard of Oz", and reappeared in many other Oz books.  In late 19th-century America, men made out of various tin pieces were used in advertising and political cartoons.  Baum, who was editing a magazine on decorating shop windows when he wrote "The Wonderful Wizard of Oz", was reportedly inspired to invent the Tin Woodman by a figure he had built out of metal parts for a shop display.

Quadling Country: The Quadling Country is the Southern division of L. Frank Baum's fictional Land of Oz, first introduced in "The Wonderful Wizard of Oz" (1900).  It is distinguished by the color red, worn by most of the local inhabitants called the Quadlings as well as the color of their surroundings.  Like the Munchkin Country, the outer regions of the Quadling Country are rich, pleasant and lovely, being inhabited by kind and friendly people, while the areas closer to the Emerald City (most of the regions between the mountains of the Hammer-Heads, the enclave of Dainty China Country and the Forest of the Fighting Trees) are forbidding and dangerous.

Balnibarbi: Balnibarbi is a fictional land in Jonathan Swift's satirical novel "Gulliver's Travels".  it was visited by Lemuel Gulliver after he was rescued by the people of the flying island of Laputa.

Tegami Bachi: Tegami Bachi (テガミバチ , Tegami Bachi , lit.  "Letter Bee") is a "shōnen" manga written and illustrated by Hiroyuki Asada.  The manga is set in "AmberGround", a fictional land illuminated by an artificial sun.  The story follows Lag Seeing, a Letter Bee with the ability to see the memories of people and items, and his personal dingo Niche on their journeys across AmberGround.

Nehekhara: Nehekhara is a fictional land in the Warhammer Fantasy world.  It is the home of the Undead forces of the Tomb Kings and the origin of the Vampire Counts, two conflicting factions of undead.  It is the Warhammer equivalent of Egypt; it even has the Valley of the Kings and the Great Pyramid.  Although most of Nehekhara is a parched desert completely devoid of life, several trade routes pass through the deserts and a few oases are to be found scattered sparsely throughout the sands.  The only living kingdom is that of Numas, which still maintains a thriving human population which serves the tomb kings as loyal subjects, and are in return protected by an army that never sleeps.

Supporting paragraphs: Ingsoc Newspeak
Answer: Oceania