Doom novels timeline

The first few Dafydd novels take place roughly in the 21st century (between 2000  (likely after 2004 based on a reference to a shuttle in the game) and 2099, c. 2012 (for the math to fall into place (2011-2012 or there abouts). A more specific timeline is given in the 4th book but re-adjusted to the People's Glorious Revolution/Liberation. It can take place no earlier than 2000 (but less likely to be before 2004 based  on the DCX-2004 spacecraft ) as it is said to be 21st century (the reference to 'doddering old Mick Jagger' would also limit when the series could take place as well, assuming he is in his 60-70s).

Background
Flynn Taggart might be canon to the game series or at least the reboot series: Entering 'FLYNNTAGGART' onto the old computer in Doom Eternal, will unlock DOOM 2, as well as the Taggart Comic Group.

Ironically, this may mean that Flynn Taggart or an alternate universe version of himself is canon to the Doom (2016)/Eternal parallel universe. Or perhaps the universe Doom Slayer ended up in is Flynn Taggart's own universe (many years after the novels. If anything Doom Slayer is using Flynn Taggart's name as alias for whatever reason.

In the novels in Endgame, Flynn Taggart had moved into the future due to FTL Time dilation, ending up in the beyond the year 142 (PGL) (roughly 2270 in the classic timeline), to around 2,500s or so.

Flynn is remembered in the far future in the Ret-Conned: The Life and Times of Flynn Taggart, and through his company Taggart Comics Group.

Flynn Taggart's escape to earth from Deimos Base in mail rocket in Hell on Earth novel appears to be a reference to the Marine (Doom II)'s escape to earth using a drop pod in Hell on Earth manual. Though depending on the source Doom II hero is same hero from Doom/Doom 64 aka Doom Slayer/B.J. Blazcowicz. While other accounts seperate the two characters from Doom and Doom II into two different persons. For there to be other marines who survived one would have to ignore the references to 'only survivor', as Fly Taggart escaped with Arlene Sanders back to earth. Doom II marine at least is implied to be the only survivor of a concurrent Mars Base invasion (much like Doom 3 Marine), while Doom 1 character (Doom Slayer/B.J. Blazkowicz) was only survivor of Ultimate Doom scenario in Doom (surviving Phobos/Deimos and finally Hell). However the fact Taggart and Arlene made it through Phobos and Deimos would also contradict the 'only survivor' claim. However, its possible that most of UAC never knew as Flynn mostly was on his own 'secret missions' in the novels (since he and Sanders disappeared into the future Time Dilation for all UAC knew both were dead), and would have been recorded as such in their records.

Timeline
(Work in Progress - Needs improvement)
 * 3,000,000,000 BPGL - The First Men/First Ones create the first Gates.
 * 2,000,000,000 BPGL - Species that would become humans started to evolve a couple of billion years ago. Possibly connected to the First Men/First Ones.
 * 18,000,000 - Six Million Year War begins.
 * 12,000,000 - Ancient books are written
 * 7,000,000-6,000,000 BPGL - True humans evolve.
 * 1,000,000 BPGL - Ancient civilization builds Gates on Mars, Phobos and Deimos.
 * 300,000 BPGL
 * Various aliens discover technology for Gates.
 * Earth had seen many invasions over several hundred thousand years or so by the Klave, Freds (artichokes, demon aliens) and the Resuscitators (Res-Men, Newbies, Human travelers form earth).
 * 30,000 BPGL - Klives build an observation base near earth, but are soon attacked.
 * 10,000 BPGL - Human civilization begins (or begins again after having been destroyed in previous alien attack).
 * 641-631 BPGL (1490s-1500s)Freds discovers Earth humans while Spain and Portugal were still sailing out in wooden wind-driven ships to map the "New World."
 * 531 BPGL - Freds return to Fredworld 
 * (1822) - Freds start heading towards Earth (on a 200 year journey)
 * (1830) - Mormon religion begins.
 * (1930) - Stogie space ships are the craze in art.
 * (1941) - Japanese attack Pearl Harbor in December.
 * (1943) - Mick Jagger is born.
 * (1945) - WW2 ends.
 * (1950) - Saucer shaped flying ships are the craze in art.
 * 129 BPGL (1981) - The first human shuttle launches.
 * 1995 - Last flight of the DC-X1 Delta Clipper, which then went through seveeral more designs.
 * 132 BPGL  - Albert Galletin is born, Flynn Taggart is born...
 * 120 BPGL 
 * Flynn (7) is humiliated by his father at a museum.
 * 122 BPGL 
 * Flynn Taggart (10) rides a roller coaster.
 * 118 BPGL
 * Flynn (14) learned that when your mind is working, don't give it a reason to stop. Flynn joins Catholic Highschool around this time. Flynn joins catholic highschool
 * 114 BPGL
 * Flynn graduates from Catholic Highschool.
 * 110 BPGL  - Future veteran of the Doom War is born.
 * 1113 BPG 
 * Flynn Taggert (19) joins the Marines. He turns down a chance to join the baseball leagues during the twelve year strike, and instead joins the Marines service and begins training.
 * (2004) - DCX-2004 is built.
 * 105 BPGL - Flynn enters active duty Light Drop Infantry. Three-month mission in Peru. Flynn starts to regret some of the things he has and will be doing in the miltary for the next seven years.
 * 104 (2008) - Flynn Taggart recommisions for another four years of service.
 * 102 BPGL - He meets Arlene Sanders. They go out to see Journey to the Center of the Earth movie together
 * 101 BPGL 
 * Flynn is at Camp Pendelton.
 * Flynn is sent to Kefiristan a few months later. He was in a trench for eight months.
 * Earth Base in Hawaii starts picking up alien signals from space.
 * 100 BPGL (2012)
 * Flynn finishes his time in Kafiristan.
 * Then the Pearl Triangle.
 * Taggert feels guilty for the stuff he is involved in for the last seven years.
 * Mick Jagger comeback tour planned.
 * Flynn is transferred to Mars.
 * Six months later - Knee Deep in the Dead
 * - Hell on Earth
 * - Infernal Skies
 * Jill Lovelace was 14.
 * Albert Galltain is 27.
 * Flynn is 23-27.
 * Flynn, Arlene, Albert and their group leave for the Klave base.
 * 101 BPGL - Jill turns 15.
 * 80 BPGL 
 * Flynn, Arlene leave Albert behind in Klave base, as they travel towards Fredworld.
 * Albert is injured in Klave Base and stays behind.
 * 29 BPGL - Albert recovers from his wounds and leaves the base.
 * 9 BPGL   - Albert returns to earth.
 * Mission lauched to plan to reach the stars.
 * 7 BPGL (2079) - Albert leaves the Marines, the Marines are disbanded in favor of joining People's Democratic Defense Forces. He starts studying life extension.
 * 1 PGL 
 * The People's Glorious Revolution occurs freeing Humans from the aliens control.
 * 13 PGL (2099) - Disrespect to Death-Bringing Deconstructionists assigned to PARI lunar base launched.
 * 20 PGL  - Flynn and Arlene reach Fredworld.
 * 31 PGL  - Gallatin Albert dies (age 132).
 * 37 PGL  - Prototype of life-stasis created.
 * 44 PGL  - Gallatin Albert's body exhibited in Hall of People's Heroes for last time (since his death). Body interred beneath Tabernacle of People's Faith of Latter-Day Saints, Salt Lake Grad.
 * 50 PGL  - Full implantation of life-stasis successful.
 * 96 PGL  - Human construction of PARI moon begins.
 * 142 PGL  - PARI moon construction completed.
 * 401 PGL  - Flynn Taggart and Arlene make it back to earth.

Doom Reboot Era
The references to Flynn Taggart and Taggart Comics Group may set an understanding to when and where Doom Reboot's UAC takes place. Assuming the MTC  dates are actually My (Mars year dates) see MTC. This would also avoid some of the issues with Doom 3 and Doom 2016's dates overlapping but the UAC cultures appearing to be completely different.
 * (MTC 2149) - Doom (2016)
 * ( MTC 2163) - Doom Eternal begins...

To fix

 * 148 BPGL  - Goforth is born.
 * 115 BPGL  Arlene spends two years of College.
 * 129 BPGL 
 * Weem joins the military.
 * Goforth joins the marines.
 * 119 BPGL  - Goforth joins the Light Drop.


 * 119 BPGL  - Goforth joins the Light Drop.
 * Arlene spends two years plastering walls for a living.
 * 84 BPGL - Arlene joins Weems unit. Dodd is interested in her, but she is not in him.


 * 83 BPGL 
 * Arlene slept with Dodd
 * 51 PGL  - Flynn and Arlene reach Fredworld.
 * 173 PGL  - Flynn Taggart and Arlene make it back to the Klave base.
 * 337 PGL - Flynn Taggart reaches PARI moon.