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 is 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.

Earth-1 is particularly important in that it is a central junction in the multiverse, being the middle intersection from which one can 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)
 * 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 = Nazi 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)
 * Ramsey Rosso's reign of terror in Central City (2019-)

Potential future

 * The Canaries liberate Star City and The Glades from Eden Corps (2040)
 * Thanagarian Invasion (2175) }}
 * 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)
 * Team Arrow and the Legends liberate Star City from Grant Wilson's army (2046; erased)
 * Team Arrow and the Legends liberate Star City from Grant Wilson's army (2046; erased)

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
 * Lois Lane

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"

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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Trivia

 * Earth-1 vibrates at a lower frequency than Earth-2.
 * 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.