This the timeline I will be using to base the events of this fanfic. I suppose it's not absolutely necessary to know it, but I think it would make the fanfic more enjoyable if it was organized. 
This I just copied from Wiki by the way :p. 

I will be using some references or scenes from Fullmetal Alchemist 2003 just because it has some more intimate moments while Brotherhood somewhat skimmed over it, however only the scenes like Trisha's death, Nina, Hughs, etc. Just reference, it's mostly Fullmetal Alchemist Brotherhood because I like it better than the first version (sue me). This ultimately means that the ending will also be based on Brotherhood and therefore also the manga.

Some key events in the fanfic only (OC events):

January 20, 1891 - Eren Elric is born.