The timeline of all major things, that happened in the universe.
Humanity launches it's first spaceships capable of travelling to other solar systems and start exploring the milky way.
In this era the humans of earth settled on the planets they discovered during the era of exploration.
During the second era of exploration the focus of humanity shifted away from the milky way and onto the Andromeda galaxy. This led to military conflicts between the Empire and the ATF, the galaxy's most dominant forces.