I have done so much fucking research on this stuff. So I'm just going to step in here and stop anyone from trying to correct me or anyone else... Because I'm bored, tired, and this amuses me.
Legend: ">" fact, "->" some limited amount of conjecture
> Anna born ~2054
> AGs arrive 2057
> Global Population drops over 50% within first few months of AGs arriving
-> Population loss is dramatically higher in areas closer to AGs because those areas are A) abandoned by UN, B) slaughtered to a child by AG ground forces
> Anchorage remains active until at least 2061
> Anchorage is actually closer to active UN zones than many major population centers -- Anchorage to Siberia/China is probably (?) a shorter distance than W. Eur to India / South Africa, but more importantly WAY fewer AGs in the way too.
-> Anchorage supported by UN 2057-2061??? Probably. Otherwise, unclear how it took 4 years for AGs to destroy it.
-> NA population (excluding Mexico?) likely a 6-7 digit number within 3 months
> AGs sit back and build forcenumbers for at least rest of 2057
> NA 2057- ~2061: ??????
> 2061: Anna finds Durga
> 2061: Anchorage destroyed by AGs
> 2062: Saskatoon Breach established by AGs
> 2062: first probing attacks reach Hometown
-> AGs were likely preoccupied fighting UN who had lots of humans + guns instead of hunting down random backwaters with unarmed 8yr olds in them.
> Somewhere between 7 and 7.5 years of intermittent combat which eventually becomes nonstop combat, Anna does not have memories of desyncing Durga during this time (possible memories deleted)
-> Gradually ramping up as Saskatoon Breach became more established (?)
> Gradually ramping up as AGs dedicate more firepower to killing weird little girl defending 4 digit population Hometown in middle of nowhere
> 2063: 300 discovered
> 2066: Great Battle w/ AG pushes on all fronts starts. SEA & NZ are major battlefields feat. AGs from NA, SA is largely ignored.
> Alaskan Offensive begins ~Nov 1-7 2069
> X Sekhmet Nov 6/7 2069
> X Saskatoon Breach Nov 6/7 2069
> Anna buries deceased citizens of Hometown Nov-? 2069
> 2069: Great Battle ends, presumably in aftermath of Alaskan Offensive which stops AGs invading SEA from NA.
> Anna spends time being science'd, therapy'd, etc. 2069-BAHHSCQ Opening Date
> BAHHSCQ occurs Current Date