OK, so I was reading the comments made in the "Open Letter" thread idylchild made. It seems a little confusing. I think before we begin anything we really need to set a timeline of events. (If I'm to play Caius a timeline will help)
As as you know, I can't work unless I have some sort of grounding in *shudder* canon. Even if it is just my little toe. I do kinda need that basis.
From going through the books this is what I've got. Feel free to add or disagree with me and we'll be able to get a good grounding for our fic :)
Around 1000BC: Aro born/created.
We assume Marcus and Caius are around the same time (give or take a few hundred years) as in New Moon were told the Volturi formed "They are well over three thousand years ago"
500 AD: The Volturi defeat the Romanians and gain control of the Vampire world
Around 1100: The Immortal Children epidemic. Told this when Carlisle explains Kate/Tanya/Irina's mother is killed by the Volturi for having created an Immortal Child, even though she knew the Volturi had strictly forbidden the making of immortal children, happened before his time.
But this confuses me, as Carlisle also says he saw two immortal children that Aro had kept in the hope of studying and taming them.
1663 AD: Carlisle was turned into a vampire
1720 AD: Carlisle finds the Volturi and stays with them for a few decades
1800's: Benito creates the first new-born army. He and the army are destroyed by the Volturi before 1863 as we're told Maria turned Jasper to aid her in creating and upholding an army of new-borns. An idea she got from Benito.
If she had the idea of a new-born army while Benito was alive, it doesn't make sense to me that she would want someone like Jasper to keep them in check as she wouldn't have the fear of the Voltrui getting involved. It seems more likely to me that she was learning from Benito's mistake.
1800's: Alec and Jane turned and join the Volturi. Aro has there entire village destroyed (don't ya just love him?)
1861: American Civil War
1863: Jasper is turned
1918: Influenza outbreak. Carlisle, sees what he wants to see and decides to change Edward and damn his soul :P
2005: A new hideous problem is inflicted on Forks, Washington - Bella Swan arrives. A waste of trees (Volturi aside) is born and a nations youth is destroyed by inane, repetitive babble. Luckily though, girls now have set the bar for prospective suitors too high. They are set to be disappointed and alone forever. Thus lowering the amount of children born to these "generation twi" girls. The world is safe once again.
Missing anything, am I? :P