Before the second reached its destination they found the first was already linking, and it's believed the sector Brennan's Triumph is in fact Alpha Centauri and possessed several gates of its own already. With the invention of jumpgates they began to explore, first building one in orbit around Earth and sending another to Alpha Centauri in order to link the two. The Terran Empire expanded to huge size in the early-mid third millennium. Even in Earth orbit, any ship seeking to fly beyond or around the Earth Torus will be fired upon by the station's defense network, even if friendly. The Terran home world is fiercely defended by both USC and ATF forces who destroy literally any ship (even those of friends) who violate their access level. This lack of trust and past experiences with the Xenon have resulted in strict policies regarding Earth orbit access.

As a result, it is rare to see a vessel from another race, or non-Terran faction, flying in Terran space. This is evident by the large numbers of military patrols and defense stations in all Terran sectors. anyone from the Commonwealth), even their Argon cousins. What is clear is that both of these forces typically do not trust outsiders (i.e. Likewise, ATF forces have been seen patrolling distant Terran sectors alongside the USC. However, this does not mean that the USC has no obligation to protect Earth or combat AGI incursions. Additionally, the ATF appear to be Earth's primary defense fleet, while the USC has a larger presence in other Terran sectors. These factions are both under the authority of the Earth Government, but despite this, the USC and ATF have completely separate styles of ship design and have chains of command independent of each other.

The Terran space-based military is composed of two known services, the United Space Command (USC) and the AGI Task Force (ATF).

Government and politics This section is a stub. The reconnection of the Solar System to the gate network has reintroduced them to X-Universe. They have, over time, rebuilt their civilization in the Solar System and have advanced technologically. Terrans are the humans left behind on Earth after Gunne separated them from the X-Universe. He would never see his home planet again, and the descendents of his forces went on to become the modern-day Argon Federation. He then destroyed the gate that led back to Earth. Gunne led the Xenon fleet through a jump gate to what is now known as Brennan's Triumph. Several years after that, the Xenon attacked Earth and tried to destroy their creators and everything they stood for. After several years the terraforming project was discontinued but their attempts to cancel the terraforming process failed because the terraformers had become sentient. These were later followed by self-replicating machines. In the year 2066 AD the Terrans started to send terraforming ships into the depths of space. All other gates were built by a mysterious people only known as 'The Ancients'. To shield Earth from alien races, they moved their only jump gate to a secluded location and a substantial military presence now buffers the void between the Solar System and the Commonwealth. They are a technologically advanced race, but their suspicion of other races, including their lost human brethren, the Argon, motivated them to be protective of their territory.

The Terrans are the inhabitants of Earth.

X3 terran conflict wiki