Ert, known variously as Earth, Terra, or Gaia, was an oceanic planet of myriad different climates in the extreme inner edge of the Outer Rim. At one point millennia before the invention of the hyperdrive, it was the home to a bustling population of Humans, and it was in fact one of the most well known candidates for the much-vied status of Human homeworld.
In 3 ABY, Imperial database technician and history aficionado Gorg Lu-kes encountered a time vergence when escaping a doomed battle in a nearby sector. Teleported to the era of the population boom with warped memories due to brain damage, he attempted to present the story of what would be the future to its inhabitants, but accepted the tale's fate when it ended up being presented as fiction set in an unspecified time before.
An expedition by techno-archaeologists funded by the Galactic Empire in 1 BBY unveiled much about Erti culture and history. A fragmented communications network localized in the system housed an extensive database of Erti knowledge and culture that was one of the most important sources for the pioneers was uncovered shortly after, revealing the story of time traveller Lu-Kes. The Empire drew design influence from old weaponry produced during a major civil war fought on the planet, most notably producing the T-Web emplacement.