20th century

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The 20th century was a turning point in the history of Earth. The population explosion following World War II caused an increase in the crime wave. To counterbalance this, many humans took up vigilantism or used scientific advancements to fight crime. By the end of the century, mankind had begun working on splicing the genome, gaining advances in nanotechnology, and had sent small ships out to Alpha Centauri. The Earth had just begun contact with galactic community. Most of the latter changes occurred during the period dubbed "The Silver Age." The following is a list of events in th 20th Century leading up to that period.

1900s

• Cyrus Gold is killed and his body is dumped into a mystical swamp. He begins the process of transforming into Solomon Grundy. (JL: The Terror Beyond)

1930's

1939

• World War II begins on Earth. Soon after, Vandal Savage receives information from his future self that he uses to take over Europe. (JL: The Savage Time)

1940s

1944

• The Justice League arrives from the Modern Age, and fights against Savage's forces, with the help of Sgt. Rock, Easy Company, the Blackhawks, and Steve Trevor. (JL: The Savage Time)

Late 1940s

• Aresia is brought to Themyscira by a sea captain after a battle and a shipwreck. (JL: Fury)
• Solomon Grundy rises from the dead, and becomes an urban legend among the populace. (JL: The Terror Beyond)

1950s

• John Stewart is born in Detroit. (JL: In Blackest Night)

1960s

Early 1960s

• The last Justice Guild comic book is realeased parallel to the deaths of the Justice Guild in a parallel universe. (JL: Legends).

• Bruce Wayne is born to Thomas and Martha Wayne in Gotham City. (BTAS: Appointment in Crime Alley)

• Jax-Ur and Mala are imprisoned in the Phantom Zone for instigating an uprising on the planet Krypton.

• Kal-El is born to Jor-El and Lara-El on Krypton. (STAS: The Last Son of Krypton)

Mid 1960s

• Brainiac collects all of Krypton's knowledge before it is destroyed. He then leaves to collect all the knowledge in the galaxy. (STAS: The Last Son of Krypton)
• Kal-El's craft lands in Smallville and he is adopted by Jonathan and Martha Kent. He is given the name Clark Kent. (STAS: The Last Son of Krypton)
• Soul Power and Sparky protect the city of Dakota from crime using electricity-based powers. Their main enemy is Dr. Menace. (SS: Blast From the Past)

Late 1960s

• Thomas and Martha Wayne are gunned down in Crime Alley by an unknown gangster. This event is witnessed by young Bruce Wayne, who is taken in by former British Intelligence officer Alfred Pennyworth and family friend Doctor Leslie Thompkins. Bruce Wayne is eight years old. (BTAS:Appointment in Crime Alley)

1970s

Early 1970s

• Wally West is born in Central City. (JL: The Brave and the Bold)

Mid 1970s

• Barbara Gordon is born to James and Sarah Gordon.
• Dick Grayson is born to acrobats John and Mary Grayson. (BTAS: Robin's Reckoning)

Late 1970s

• Bruce Wayne travels abroad to learn to be a crimefighter. He begins by studying to be a detective, and he also studies science under Nobel laureates. (BTAS: Night of the Ninja)

1980s

Early 1980s

• Bruce Wayne spends a month under magician Zatara's tutelage. While there, he learns escape artistry, and he develops an attraction to Zatara's daughter Zatanna. He goes by the name John Smith. (BTAS: Zatanna)
• Clark Kent meets the Legion of Super-Heroes when they attempt to ward off a future version of Brainiac. He ends up having his memories erased. (TNSA: New Kids in Town)
• Clark Kent is told of his Kryptonian heritage by his parents. (STAS: The Last Son of Krypton)
• Bruce Wayne trains under Yoru-Sensei. He meets Kyodai Ken, who is able to best him in hand-to-hand combat. (BTAS: Night of the Ninja)

1986

• After many years abroad, Bruce Wayne returns to Gotham City. While attending college, he meets and gets engaged to Andrea Beaumont, daughter of Carl Beaumont. When Carl's mobster connections force them to move, Andrea breaks her engagement to Bruce. Around the same time, Bruce, still haunted by his parents' deaths, begins crimefighting. At first, he attempts to do it dressed in common clothes, but then realises that he must strike fear into the heart of his enemies and dons cape and cowl to become Batman. (Batman: Mask of the Phantasm)

• Batman's first Batmobile breaks down and he hires Earl Cooper, a former auto executive, to build him a brand new Batmobile.
• Dick Grayson is placed into Bruce Wayne's custody after his parents are killed by Tony Zucco. (BTAS: Robin's Reckoning)

1987

• Tim Drake is born to "Shifty" Steven Drake in Gotham City. (TNBA: Growing Pains)
• Virgil Hawkins is born to Robert and Jean Hawkins in Dakota. (SS: Flashback)

Late 1980s

• John Stewart is recruited by Abin Sur into the Green Lantern Corps. He begins his training with Katma Tui. (JL: Hearts and Minds)
• Carl Beaumont is murdered by a hitman hired by Sal Valestra. (Batman: Mask of the Phantasm)

1990s

1993

• During a fight between Batman and Sal Velestra's goons, a mobster is dropped into a vat of acid, and becomes the Joker. (BGK: Mad Love)
• Dr. Victor Fries is transformed into Mr. Freeze by Ferris Boyle and his security guards, while Fries attempts to cure his wife Nora of a disease. (BTAS: Heart of Ice)
• Batman fights a gang of jewel thieves. (The Dark Knight's First Night)

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