Sera (Earth-6854)

Sera is the fourth planet in the M-344/G system and the homeworld of humanity. The planet has a 26-hour day, and its topography consists of five large continents, surrounded by the massive Serano Ocean, as well as numerous small island chains. Beneath Sera's surface lied the Hollow, a complex network of tunnels and caverns that was home to the Chimera and the Flood. Sera is orbited by two moons: Turul and Urs.

Prehistory
According to researchers of the SRPA, approximately 60 million years in Sera's past, the planet was the site for a battle between the Chimera, or their ancestors, and an invading sentient race. The outcome of the war is unknown, but it has been reported that the damage was significant enough that it forced the Chimera to abandon the surface and retreat to the Hollow. At approximately 200,000, humanity emerged.

Age of Armageddon
Sera's history is plagued with conflict that nearly drove the planet to destruction. This period of time, known as the "Age of Armageddon", was a global conflict that spanned through one thousand years and threatened to extinguish humanity. At some point during the conflict, the Serans rejected the conflict and blood, including the concept of war itself, to usher a new era of peace and prosperity for their peoples.