Earth-1

"This Earth is at the center of the multiverse. It's the access point to every other Earth in existence."

- Hunter Zolomon, referring to Earth-1

Earth-1 was a universe parallel to a plethora of others, such as Earth-2. The name was coined by Martin Stein. To Earth-2 citizens, Earth-1 was initially referred to as Earth-2. Also, to Earth-17's citizens, it is known as Terra Prime. Grodd has called this universe Prime Earth and First Earth. After a massive exodus during the crisis, it became home to 3 billion refugees from Earth-38 after that universe was destroyed by a wave of antimatter. Shortly after, however, the antimatter wave hit Earth-1 as well, vaporizing its population and destroying the entire multiverse with no Earths remaining. It was also the final Earth to be destroyed.

Earth-1 was particularly important in that it used to be a central junction in the multiverse, being the middle intersection from which one could travel to any other alternate Earth.

History
After learning of the existence of parallel worlds, Martin Stein coined the world's name, "Earth-1", to describe Team Flash's relative position in regards to all of the other worlds. Beginning in the early 21st century, it has become home to numerous groups of extraordinary protectors, such as the vigilante unit Team Arrow, the scarlet speedster known as the Flash and his team of allies who emerged after the explosion of the S.T.A.R. Labs particle accelerator that gave rise and prominence to superpowered meta-humans, and John Constantine's group of mystical allies. Even in other times, similar such heroes operate, such as the secret mid-20th century alliance the Justice Society of America, and the time-travelling Legends, who are associated with the top-secret organization of the Time Bureau.

A.D.
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 * Damien Darhk's assault on {{F|Camelot|(507)}}
 * Viking exploration of North America/Vinland (1000)
 * Al-Fatih founded the League of Assassins (1013)
 * The Ninth Circle was founded (between 1301-1400)
 * {{F|Salem Witch Trials|(1692–1693)}}
 * {{F|American Revolutionary War|(1775–1783)}}
 * {{F|page=Civil War|American Civil War|(1861–1865)}}
 * {{F|Belle Époque|(1871–1914)}}
 * Launch and destruction of the Titanic (1912)
 * {{F|World War I|(1914–1918)}}
 * {{F|Battle of the Somme|(1916)}}
 * Launch of the Spirit of St. Louis (1927)
 * {{F|Spanish Civil War|(1936–1939)}}
 * {{F|World War II|(1939–1945)}}
 * {{F|Battle of Saint-Lô|(1944)}}
 * {{F|Cold War|(1947–1991)}}
 * {{F|Vietnam War|(1955–1975)}}
 * {{F|Gulf War|(1990–1991)}}
 * {{F|Redmond Dominator Invasion|(1951)}}
 * {{F|Woodstock|(1969)}}
 * {{F|Somali Civil War|(1991–present)}}
 * {{F|Battle of Mogadishu|(1993)}}
 * Mallus defeated by The Legends (1992)
 * {{F|Afghan War|(2001–present)}}
 * {{F|Alpha-Omega release (Hong Kong)|(2010)}}
 * {{F|page=The Undertaking (event)|The Undertaking|(2013)}}
 * {{F|page=S.T.A.R. Labs particle accelerator#The Explosion|S.T.A.R. Labs particle accelerator explosion|(2013)}}
 * {{F|The Siege|(2014)}}
 * {{F|Alpha-Omega release (Star City)|(2015)}}
 * {{F|page=Genesis (event)|Genesis|(2016)}}
 * {{F|page=|Metapocalypse|(2016)}}
 * {{F|Dominator Invasion|(2016)|page = Dominator invasion}}
 * {{F|Earth-X Nazi Invasion|(2017)|page = Earth-X invasion}}
 * {{F|Enlightenment|(2018)}}
 * Cicada's war against meta-humans (2018–2019)
 * Emiko Adachi and the Ninth Circle's war against Oliver Queen and Star City (2018–2019)
 * Mar Novu recruits Oliver and his team as well as Barry and his team for a coming crisis. (2019)
 * Ramsey Rosso's reign of terror in Central City (2019)
 * Talia al Ghul and Thea Queen founded the League of Heroes (2019)
 * {{F|Crisis of 2019|(2019-)}}
 * 3 Billion Earth-38 survivors becomes refugees
 * The End of the Multiverse

Potential future

 * The Canaries liberate Star City and The Glades from Eden Corps (2040)
 * Thanagarian Invasion (2175) }}
 * Thanagarian Invasion (2175) }}

Timeline alterations

 * Flashpoint (briefly; erased due to Barry's restoration of the timeline)
 * Legion of Doom's alternate reality (briefly; erased due to the Legends' intervention)
 * Anachronisms (formerly; timeline fixed by the Legends)
 * Crisis of 2024 (2024; erased and advanced to 2019 due to changes in the timeline)
 * Crisis of 2024 (2024; erased and advanced to 2019 due to changes in the timeline)

From Earth-3

 * Jay Garrick/The Flash

From Earth-19

 * Cynthia/Gypsy
 * Josh/Breacher
 * H.R. Wells (became permanent resident, deceased)

From Earth-38

 * Alex Danvers
 * Kara Danvers/Supergirl
 * Querl Dox/Brainiac 5
 * Mon-El
 * J'onn J'onzz/Martian Manhunter
 * Clark Kent/Superman
 * Jonathan Kent
 * Lois Lane
 * About 3 billion human and alien refugees following the Evacuation of Earth-38

From Earth-90

 * Barry Allen/The Flash

From Earth-221

 * Harrison Sherloque Wells

From Earth-X

 * "The Ray" (deceased)
 * Leo Snart
 * New Reich
 * Oliver/Dark Arrow (deceased)
 * Kara/Overgirl (deceased)
 * Tommy Merlyn/Prometheus (deceased)
 * Laurel Lance/Siren-X

From The Monitor's realm

 * Mar Novu/The Monitor

From unknown Earths

 * "Music Meister"
 * Harrison Nash Wells

Arrow
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Season 8
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The Flash
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Season 6
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Vixen
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Season 2
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DC's Legends of Tomorrow
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Season 4
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Supergirl
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Season 5
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Batwoman
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Season 1
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Trivia

 * Earth-1 vibrates at a lower frequency than Earth-2 before the latter was destroyed in an antimatter wave.
 * Earth-1, along with Earth-38, is one of the few Earths to not be aware of the multiverse. As a result, King Shark and Black Siren are mistaken for their Earth-1 counterparts.
 * Earth-1 was the last Earth to be destroyed by the Antimatter wave that destroyed every other Earth leaving none remaining.