So I figured M&H and Balance were SUPER confusing without a timeline, so I got it sorted out. (I went back in and added changes to the stories on Wattpad)

The Ladious Legend marks the beginning of dragon time.

I might write the Ladious Legend some time later, but basically there was this dragon with 4 heads, he had all the main elements, so yes, Fire Dragons DID exists at one point. One brother was like, ok, "I'm gonna seperate us but the price is that we can't be immortal anymore."
So they seperated and created their own dragons just like them and that started all at 0.
•250s - The Flame Wars between Earth and Fire Dragons erupted.
•940s - Fire Dragons became extinct.
•1,300s - Air Dragons experienced the Feather Flu, a deadly plague. It doesn't affect them in the present as much as it did in the past.
•2,500s - Ice Dragons were documented.
•2,750s - Ice Dragons were banished from Terragon Heights.
•3,020s to 3,040s - Air Ice Wars.
•3,046 - Air Ice Wars ended.
•3,052 - End of the book "Balance"
•3,055- Beginning of book "Vendetta" Present Day.