Ages and Eras

Introduction
Throughout a lot of my worldbuilding stuff it's, like, very dependent on the times in which it takes place? With a lot of my stuff I go with an alternate history Earth that's set possibly 50~ technologically ahead of the current Earth dependent on era? I'll be sure to mention the technological advancement of each era/age. Shiiiiittttt this is gonna be a lot of writing Ꮚ•̀ꈊ•́Ꮚ

Divine Genesis and Prehistory to Protohistory Era
This is the era in which the gods had created the heavens and the many planes of existence, as well as the basic elements of life and matter--following all the way up until the modern species of the planes (things like Humans, Dwarves, the Giants, the Dragons... things you see in every other era) had self-realized, forming 'history' through recordkeeping and creative outlet. Humans, Halflings, Dwarves, Elves, Giants, Dragons, Orcs, Lords, Dragonborn, Saurians, and Goblinoids were created in this time by their respective gods or the collaborative effort of many divine figures. Kobolds were created by the dragon-god scholars to be a perfect weak, stupid, cute minion for the Dragons at this time.

Ancient Era
The era in which early large-scale civilizations (like those in Mesopotamia and China) began to spring up and thrive well. This era is marked by the first assault of Tiamat against the metallic dragonborn of Qinad in Bruvodell, and her defeat by a thousand silver spears. Dragonborn and different species of Beastfolk had population numbers boost substantially, eventually reaching near that of Humans. Around this time, sentient humanoids born from either Celestials or Fiends began to appear, forming small tightly-packed communities. Murid and Gnolls began to appear as well, apparently having only then been created by their respective demon-gods. Minotaur and Bakeneko were nearly the largest population at this time, having appeared in Greek and Eastern lands. This era too marked the beginnings of the races of the Sahuagin, Probosc, and Rapere. In this era, Serpentus had made their agreement with their demon snake-god, changing their forms forevermore to that of serpentmen.

Medieval Era
This era includes three within it. It is marked by the incredibly large-scale development and civilization as well as war, poverty, and corruption be coming more and more common.

Brom I Era - 1100s to mid 1200s

A period marked by the first Martian invasion, the formation of the first Brown Bear covenant, and the life and death of Big Man Brom. This era marks the creation of Harvestfolk, as well as the growing knowledge of the Harvest Witch. Technological, architecture, and weapon advancement was roughly around that of the real-world era of the 1300s. This era is also marked by the growth of the Murid and Gnoll races. The Bogmen (or Conran as some call them) of forgotten swamps around Europe and Africa had been discovered living peacefully alone at this time, their barbaric history beforehand unknown. Also too had the Feylands-inhabiting Cynocephalus and Chelyman made their first steps into the Awakened or Material World. A less warring and combative fishfolk than Sahuagin had come up from the depths of Earth's oceans, the Locathah or Gill-men. The half-giant Firbolg of the Feylands had also been discovered in this era by other racial-groups.

Brom II Era - Late 1200s to late 1300s

This era is most remembered by the reincarnation of Tiamat and her inevitable defeat, as well as the plague she released from her body onto the world around her in a fit of hatred--causing countless deaths. This plague would not settle and die out until the Lightless age. The tiny rabbit people of the Feylands had also been introduced to the material plane in this era, the Pookah. Kenku, a small race of flightless avian trogloditic humanoids had been discovered. This era also marks the creation of the first Warforged as they were used against each other in warring nations. This era is also the first in which the alchemically-created Changelings became a somewhat-common sight.

Lightless Age - 1400s to late 1500s

A period of time marked by the founding of the massive underground labyrinth-world of Noctil and the hiding-away from Tiamat's plague. By now, the level of technological advancement was around that of real-world mid 1600s to very early 1700s. Firearms and gunpowder-based inventions were now common. And though technological advancements were made, the new home for all of Earth's sentient inhabitants was dark, dangerous, and cold. Use of swords and deadly, barbaric technological advancements thrived due to the beasts that lurked below.