(Thanks to Steve Replogle for most of the Tom Strong entries, Jess Nevins for the historical Tom Strong info and Mark Parkinson for additional info)
411 AD
In Alexandria the original little girl Promethea is sent out into the desert by her father shortly before he is killed. Thoth and Hermes rescue her taking her to the Immateria where she becomes a story. [Promethea #1]
1097
Battle of Antioch. A Muslim and a Christian who both manifest Promethea battle one another to the death. The event is so dramatic that it is completely wiped from Promethea's mind.
12th Century AD
The Black Arrow, Ivanhoe, and Robin Hood form a fellowship of extraordinary men. [LXG]
15th Century AD
An Italian explorer is instrumental in colonising the Americas, and, donning a mask and a costume, with a funny name, becomes the first First American. [America's Best Comics 64 Page Giant]
17th Century AD
Captain Blood and the Sea Hawk accompany D'Artagnan, Athos, Aramis and Porthos as mysterymen. [LXG] [Note: Cyrano de Bergerac has crossed over with D'Artagnan in novels by the son of Paul Feval and others, and it's nearly impossible for me to imagine the character not being involved in such a society]
Prospero, Caliban, Ariel, the pilgrim Christian, and Captain Robert Owemuch become known as Prospero's Men in defense of the realm in the 1680's.
1751
Charlton Sennet, author of A Faerie Romance, born. His housekeeper, Anna, manifests Promethea.
1775-1780
Sennets' housekeeper Anna dies whilst giving birth. The baby is only half real and does not survive. [Promethea #4]
Tom Strong I has adventures in the Revolutionary War. [speculation, based on Tom Strong, Washington's Scout by Alfred Mason]
Lemuel Gulliver, The Reverend Dr Syn, Natty Bumppo, Moll Flanders, Sir Percy and Lady Blakeney form a society of extraordinary gentlemen.
1790's (approx)
Tom Strong, Junior has adventures. [speculation, based on Tom Strong, Junior: a story of the young United States by Alfred Mason]
1803
Charlton Sennet dies.
1812
A descendent of Tom Strong has adventures in the War of 1812. [speculation, based on Tom Strong, Boy-Captain: A Story of America by Alfred Mason]
1840's (approx)
The adventures of Tom Strong, Third: A Story of the United States when the Railroads were New. [speculation, Alfred Mason]
1860's
A descendent of Tom Strong has adventures in the American Civil War. Sometime later he sires a son, Sinclair Strong. [speculation, based on Tom Strong, Lincoln's Scout by Alfred Mason]
1886
President Crowley's New Cities Bill leads to the creation of Millennium City on the eastern seaboard near New York. The city is designed by architect Winsor McKay.
1889
Allan Quatermain ingests the narcotic taduki and enters a state akin to the Dreamlands, a land where linear time does not exist. Indeed, there he meets the astral projection of Randolph Carter, who has come from the early 20th century. He also meets Randolph's great-uncle, John Carter, who, on his way to Barsoom from the Arizona cave where he lay dying in 1866, has been diverted to this realm. At the end of the second chapter, as the three are about to be attacked, The Time Traveler appears to rescue them. It is also revealed that the Morlocks of the far future are related to the Mi-Go of the Cthulhu Mythos. [Allan and the Sundered Veil (League of Extraordinary Gentlemen #1-6)]
1890's
La Toile, Mistress of Villainy, has adventures in Paris France.
1898
May-August
Wilhelmina Murray, Allan Quatermain, Captain Nemo, Dr. Hawley Griffin, and Mr. Edward Hyde become known as The League of Extraordinary Gentlemen in defense of the realm. They are at least occasionally accompanied by Dorian Gray, Tom Sawyer, and in later years Professor Challenger. Meanwhile, on Mars (Barsoom), John Carter, the Barsoomian Green Martians, the Sorns, and Gulliver Jones of Mars are prominently featured in the battle to resist alien invaders. The invaders eventually emigrate to Earth. [League of Extraordinary Gentlemen Volume II #1]
August
First War of the Worlds occurs. [War of The Worlds by H.G. Wells]. League of Extraordinary Gentlemen reunite after their last month's adventure to stop the Martians. They continue to take their orders from Campion Bond, who in turn serves a new "M," presumably Mycroft Holmes. [League of Extraordinary Gentlemen Volume II #2-6]
1899
Sinclair Strong and his wife Susan (nee Whittaker) crash onto Attabar Teru. Their ship's captain, Tomas Stone, dies. Pnueman constructed on Attabar Teru. [Tom Strong #1]
In an alternate timeline, Tomas Stone and Susan Strong crash onto Attabar Teru. Sinclair Strong dies. [Tom Strong #20]
January 1st, 1900
Tomas Strong born on Attabar Teru to Sinclair Strong and his wife Susan. [Tom Strong #1]
In an alternate timeline, Tomas Stone II born on Attabar Teru to Tomas Stone and his lover Susan Whittaker (formerly Susan Strong). [Tom Strong #20]
1901
William Randoloph Hearst's newspaper The New York Clarion begins publishing "Little Margie in Mystic Magic Land" in its Sunday color edition. The strip's creator, Margaret Taylor Case, manifests as Promethea.
1903
Margaret Case introduces the character of Promethea into her comic strip.
March 1908
An earthquake claims the lives of Sinclair and Susan Strong. Tom is free of the chamber. [Tom Strong #1]
1909
Tom Strong's future wife Dhaulua born on Attabar Teru. [Tom Strong #1]
1910's
The occult investigatress known as The Soul has adventures. [Previews interview]
Robur, The Nyctalope, Arsene Lupin, Fantomas, Sar Dubnotal, and The Phantom of the Opera form Les Hommes Maid has adventures. [Tomorrow Stories #4]
1915
At Ypres, Promethea leads many lost soldiers back to safety. [Promethea #5]
1920
Margaret Taylor Case retires. Last Promethea story published in November 1919.
1921
Tom Strong, having transformed Attabar Teru with electricity, goes into the outside world for the first time. Settling into Millennium City, he soon becomes partnered with reporter Greta Gabriel and encounters killer Charley Bones. [Tom Strong #1]
1922
Tom Strong defeats Saveen's "Mechanthrope."
1924
Astonishing Stories begins publishing Promethea novellas. 15 in all are written starting with "A Warrior Queen in Hy Brasil". Other titles include "Promethea and the Manigators". The house name for a number of authors is Marto Neptura and the illustrator is Grace Brannagh, who manifests Promethea.
1925
At her spirit quest, Dhalua meets Bala-Sibbi.
October 1925
Tom Strong goes to the land of the dead.
1928
Marriage of Tom and Dhaulua Strong occurs.
La Toile visits the Castle of Tears. When next she appears, she has apparently reformed, and fights crime in Indigo City as The Cobweb. Her connection to an American girl named Laurel Lakeland is unknown.
July 18th
Tom Strong defeats Paul Saveen atop the Statue of Harmony. Saveen is presumed dead.
1930's
Dhalua makes her first trip to Millennium City.
Tesla Strong born.
Solomon was born around this time.
1938
Amazing Stories has been sold to Apex Magazines
1940's
Dhalua inspires the "Dhalua Look" fashion craze.
Jetman I and Jetlad have adventures. Decades later, Steve Traynor changes from Jetlad to Jetman II and has adventures in the city of Neopolis. [Top Ten]
An unnamed demon appears in London (in which he called it "Londinium"). [Promethea #8]
A government agency genetically engineers Troy Todd (the son of the science heroine Minute Maid) to become First American, the 73rd in his family line to bear that name. He locates his headquarters in the Americrypt and is soon joined by a kid sidekick, Buckley. [Tomorrow Stories #5]
First American & Buckley, Jetman & Jetlad, Cane-Toad Man & Tadpole, The Human Porch, John Q. Public and eleven others form The Incredible Nineteen. [Tomorrow Stories #4]
1941
Apex begins publishing Smashing Comics.
July 6th, 1945
Tom Strong meets Ingrid Weiss for the first time.
1946
Science heroine version of Promethea appears in comic book form. From 1941 to 1970 William Woolcott writes and draws the Promethea stories. Bill manifests Promethea himself.
1949
The Incredible Nineteen is disbanded by the government. [Tom Strong #21]
City of Neopolis founded. [The 49'ers]
1950's
Sal Paradise, Dean Moriarty (the great-grandson of James Moriarty), and Doctor Sax (possibly accompanied by Wilhelmina Murray and Allan Quatermain, but reports are inconclusive) travel to the Interzone as an impromptu legion of extraordinary heroes. [Tripwire interview]
Cobweb solves "The Riddle of the Hibernating Heiresses." [Tomorrow Stories #1]
Johnny Future has adventures. [Tomorrow Stories]
Created by deranged comics artist Mort Gort in a Quixotic quest for four-dimensional ink, Splash Brannigan resolves to use his inky powers for good. Unfortunately, after a full career he takes a nap and gets trapped in a bottle of ink for fifty years until Daisy Screensaver rescues him. [Tomorrow Stories]
1951
Tom Strong, Promethea, Cobweb, Splash Brannigan, and Johnny Future form America's Best.
1954
Tom Strong and Dhalua first go to Pangaea and meet the Pangaean.
1961
Svetlana X has adventures. [date approximated from purported origin of Octobriana]
1962
Tom Strong thwarts a Saveen-engineered dinosaur attack.
1968-69
Dahlua deputises for Tom Strong in America's Best when he travels to Terra Obscura. On route he has "memorable encounters" with the Magnetar Pirates and Zax the Baryonic Man.
1969
Pieces of the Pangaean, brought back unknowingly by Tom and Dhalua Strong, have grown large, and attack. Tom Strong captures it and puts it in his lab.
Frankie Lafayette and Johnny Apollo first encounter The Lure. [Greyshirt: Indigo Sunset #1]
1970's
The supernatural hero known as Limbo has adventures. [Previews interview]
1971
Steve Shelley takes over writing the Promethea comic, and his wife Barbara manifests Promethea.
1972
Professor Parallax dies.
1974
The Pangean creature escapes, and Tom Strong sends it back in time.
1978
Candice joins Franky and Johnny's crime-filled adventures. [Greyshirt: Indigo Sunset #2]
1981
Bob, Kenneth, Marv, Roger, and Stan form The Five Swell Guys. [date approximated from post-Zero Hour origin of Challengers of the Unknown]
1987
Tom Strong and others destroys the Modular Man for a second time.
1988
Jack B. Quick born in Queerwater Creek.
1989
Comic book writer Byron Lord dies from an explosion caused by Johnny Apollo. [Greyshirt: Indigo Sunset #3]
Franky and Johnny's friendship ends. Johnny Apollo becomes The Crone.
Johnny Lafayette becomes Greyshirt in Indigo City. [Greyshirt: Indigo Sunset #5]
1991
Steve Shelley dies from cancer. [it's possible that he died in 1996 instead of 1991]
1999
Using plans found on the internet, the Funt Brothers create one of the Modular Man's modules. Tom Strong gives the Modular Man his Hypersaucer in exchange for good conduct. A month later, Tom fights the Aztech Empire.
Sophie Bangs interviews Steve Shelleys' widow Barbara and becomes Promethea for the first time. [Promethea #1]
Joanie Juniper is genetically engineered to become U. and accompanies First American as his latest sidekick.
July 6th
Tom Strong fights Ingrid Weiss, gets thrown back in time and battles the Pangaean. When he returns, he fights Charade and Weiss, while meeting his son for the first time. Dhalua breaks Ingrid Weiss for trifling with her family.
2000
March
Cobweb defeats Victoria Price, the Money-Spider. [Tomorrow Stories #6]
April 12th
Tom Strong discovers an alien in Guatemala.
Tesla Strong fights Kid Tilt.
April 17th
Tom Strong investigates the volcanic flare-ups on San Mageo.
May 1st
Tom Strong and Solomon investigate Devil's Footstool.
July
Tesla Strong opens up the alternate dimensions and meets her alternate counterparts.
Tom Strong goes to Funnyland and meets Warren Strong.
2001
September 11
Bob of The Five Swell Guys killed (amongst 3,000 civilians) from The World Trade Center disaster. His teammates carry on as The Four Swell Guys. [Promethea #28]
October 16th
Snots Lamonico causes Greyshirt to go "missing" after Judge Joilet's assassination attempt. He survives the attempt. [Greyshirt: Indigo Sunset #1]
November 5th
Firstleigh Jefferson American (aka Troy Todd) is elected President of the United States. Within two hours, a recount of votes results in the annulment of his position. [Tomorrow Stories #10]
November 18th
Greyshirt stops a couple of gangsters after the murder of Bernard Novak. It later causes Lakeland Museum of Contemporary Art to be declared a "Menace to Public Health". [Greyshirt: Indigo Sunset #2]
December 18th
An unnamed murderer known only as "The Shadow" is killed. [Greyshirt: Indigo Sunset #3]
2002
April 16th
Greyshirt stops Vinnie Assapunto after he kills five people because they make jokes about him. [Greyshirt: Indigo Sunset #5]
2003
After King Solomon and his alternate counterparts are kidnapped by Tiberius "Black Tom" and Twyla Strong of Terra Beta, Tesla Strong goes across the multiverse to look for him. [Many Worlds of Tesla Strong #1]
Tom Strong, Jonni Future, Cobweb, Greyshirt, Splash Brannigan and Jack B. Quick unite to save the world from an upcoming apocalypse. [Promethea #27-28]
2004
Pearl of the Deep has adventures as an underwater super-heroine. [Previews interview]
2050
Tesla deputises for her father as protector of Millennium City when he is unavailable. Solomon's son, Augustus, has by now joined the family.
4 Billion AD
Johnny Future (and, later, Jonni Future) has adventures.
Appendix:
Other notable parallels in the ABC multiverse include:
Terra Alpha - Tom Terrific and his daughter Tesla Terrific/Tara Stone (reflects DC Silver Age)
Terra Beta - Tiberius "Black Tom" Strong and his daughter Twyla Strong (evil counterparts)
Terra Gamma - Tom Strong, Cobweb, Greyshirt, Johnny Future, Promethea, Splash Brannigan, First American, Top Ten (primary ABC line)
Terra Delta - Iron Tom and his daughter Tekla Strong (advanced tech)
Terra Epsilon - Texas Tom and his daughter Two-Gun Tesla (19th century tech, Western theme)
Terra Zeta - Tom of the Tigers and his daughter Tes of the Tigers (feral theme)
Terra Gamma2 - Thomas Teen and his daughter Tezzie Teen (teen humor comics theme)
Terra Eta - Tom Trash and his daughter Tesla-Sue Trash (white trash)
Terra Theta - Tom Stone and Paul Saveen of the Strongmen of America, and the latter's daughter Tesla Saveen (divergent Terra Gamma)
Terra Iota - Terro Strong and his daughter Tori (acquatic)
Terra Kappa - Tyrone Strong and his daughter Tamla (eros)
Terra Lambda - Aztom Energico and his daughter Aztesla (giant Aztec)
Funnyland - Warren Strong and his daughters Topsy, Turvy and Fluffytail, Supermouse (funny animals)
Terra Obscura - Tom Strange, The Mask, Captain Future, Major Mars, the Green Ghost (Golden Age)
Terra Obscura-A - Black Bat, Captain Future, the Ghost (pulp)
Terra Media - Fantastic Four, Spider-Man, George of the Jungle, others (America's Best TV Comics)
Terra Meta - Tom Turbine, the Justice Guild (animated metafictional)
Terra Brittania - Captain Universe, Speedsmith, the Bluestocking [speculated] (UK-based Arnold Book Company)
Terra Commerce - Tom Tootsie, the Inquisitor [speculated] (advertising characters, may be the same as Earth-Hostess)
Others can be inferred from the glimpses of "L'il Tesla" and "1950's Space Tesla" as well as a hippy Tesla, a lionine Tesla, a pixie Tesla, a barbarian Tesla, and various counterparts of Terra Gamma's King Solomon including in a French military uniform, in a Charlie Brown sweater, in a Robin uniform, in a Frankensteinian mode, in commando gear, in a hockey uniform, in a beduin outfit, in medieval garb, in a Thor (Marvel version) uniform, and others.
In 1963 #6 we see the Blur & Blur Boy of "Earth-Alpha" as well as the Blur of "Earth-Beta." The formerly could credibly come from Terra Alpha listed here, although the latter is plainly not from Terra Beta.