This timeline breaks down every Battlefield game by level, if you want the more simplified timeline line here for the Battlefield timeline.
Battlefield debuted in 2002 as a capture the control point type first person shooter focused in the World War II Era. Since then they have added numerous sequels and a few spin-off titles to the series. Below I have every game and book in the Battlefield series that is at large considered canon. If it contradicts the main timeline or is considered an alternate timeline I left it out, but as a whole almost everything made it onto this timeline.