Midgard

is the name given to the alternate world where the fanon works of Attack on Titan: Midgard take place. It is an alternative version of the real-life planet Earth, as well as an alternate version of the world in which the fictional series  takes place. Like the real world, the planet is inhabited by Humans; like the setting of Attack on Titans, it is also home to monstrous.

Early history
Midgard's early history is unknown. However, according to the predominate religious tradition on the planet, Ymir was the primordial being who set the foundations of the world. With his godlike power, he laid the foundations for the earliest civilizations before mysteriously fading from the books of history.

Recent events
As of the year 814, the world of Midgard (much like its alternate cousin) finds itself in a state. Humanity dwindles on the brink of extinction across the globe due to the proliferation of, which began at an unknown period in the past. Civilization has collapsed and most of humanity lives in scattered surviver bands, though some have managed to form walled communities.

Society
Whether or not Midgard resembled the real world prior to its post-apocalyptic state is unknown. Society broke down in the aftermath of the Titan proliferation, forcing those surviving humans to live in roaming bands. Only small groups of humans have managed to form safe havens, as the Titans are easily able to breach most standard gated communities.

As a result, most of humanity has become cold and cruel to their fellow survivors. More concerned with the survival of themselves or of their groups, it is not uncommon for humans to fight amongst each other as well as against the Titans that plague them.

Trivia

 * Ymir, the mythical founder of civilization, was also the name of a prominent figure in the  franchise. There, she was the original Titan, and the first to wield the power of the Titans. It is unknown if he and the Ymir of Midgard are related; however, the Ymir of Midgard is male, while the Ymir of that world is female.
 * In Norse mythology, Ymir is the progenitor of the jötunn, a giant race of people. From his flesh, the original Norse gods were born.
 * Midgard also draws its name from Norse mythology, being the realm in which mortals live, and in which the planet Earth exists.