Atlantis is gone at this point, after the Antidrasi war concluded. Something appears to have happened to Atlantis, yet no discernible record remains to explain what happened to the island. With the dragons from Atlantis gone with it and nothing to pass on to others, dragons as a whole enter a huge recession in advancement and are forced to basically start over. This is a time when even not all dragons were aware they had magical talent.
2xxx BC
The earliest known settlements dragons after Atlantis begin to appear. Mostly nomads and clans. Few at this point even know that Atlantis even existed.
1032 BC
One story from the old times kept alive and passed on from generation to generation, was the legend of two dragons. One of the sun, and the other the moon. Known as descendants of the Great Sun Dragon God Helios. It was said they led dragon kind to the promised land.
1031 BC
A new religion is established believing that these two dragons are the same as the Moon and the Sun, earning the names Aturis, the first son of the Great Sun Dragon God, and Venuit, the sister to Aturis, the Goddess of the Moon. Many religions involving the Sun and moon are created.
700 BC
Humans begin to establish more advanced societies, and these are believed to have been connected to the humans involved in the early Atlantis. Dragons notice this and some debate to exterminate them before they become too strong, but it is decided to leave them be. Baring some who would want to raid farms once in a while.
250 AD
The fall of Rome occurs, due to a series of political failures and then picked off slowly by vikings from over the Mediterranean. Later it was discovered that these attacks were done by Wyvern travel. So hunts to find where the Wyvern riders are hiding out begin.
272 AD
The home of the Wyvern riders is found. A select group of dragons prepare an attack, and the war named 'Eleftherosei Adelfos' or 'Liberate Brother' starts up.
274 AD
Two years after the initial attack, the country side of where the vikings called home is burnt to a cinder and the Wyverns let free.
541 AD
A great black dragon rises from it's slumber near Constantinople and flies over the city traveling across the European country side. A pandemic occurs, and is known as the Plague of Justinian. By the end of it's rein, human mortality rates alone reached nearly 25 million people. After this the black dragon disappears, and though the Atlanteans make efforts to find this black dragon, there is no success.
793 AD
A group of water dragon scholars with knowledge of the old Atlantis build a new Atlantis at the bottom of the ocean in it's place, rapid advancements in technology are created there. The name of this place was New Atlantis. Operating mostly under the radar they were very conservative and very distrusting of outsiders. Through this however, dragon kind, at least a minority of dragons, is put back on track to advancement. They became known as Atlanteans, an island nation type sub culture that is primarily comprised of water and water related dragons.