Invaders (Pax Terra)

((NOTE: This timeline is based off of Harry Turtledove's Worldwar series, although it will try to be more realistic and different.

In extraterrestrial taxonomy, Aliena Sordibus (Latin for filthy foreigner) is an intelligent reptilian triped native to Proxima Centauri b in the Proxima Centauri system. Derogatively, they are known as "Invaders", "Others", and "The Aliens". In official documents, they are called Aliena. They are they only known other intelligent life in the universe besides humans. They evolved from other earlier species of Aliena, although they are the only extant species of Aliena.

Native to a planet with average temperatures of 83°F during the day, Aliena has evolved to be a thermoregulating organism, with a healthy body temperature of 108.1°F.

Biology
The Aliena is an extraterrestrial alien race with many complex body parts, systems, and organs.

Nervous System
Its nervous system is similar to humans, with a central nervous system that coordinates with "nerves" throughout the body. The brain is made up of billions of nerves, which process information similar to a human brain. The nervous system has no glial cells, instead nerves also function as glial cells. The Aliena brain is much more dense and larger than a human brain, although both species often score around the same on intelligence tests. Near the brain is the "sensory center", an organ that processes sensory information. It is separated from the main brain, and also controls some visceral motor functions. It sends all the information it receives to the main brain, although this link may be severed.

History
The Aliena have been united for nearly 300,000 years, and have a very very long history. Most of it comes from the early stages of the race.

NOTE: Time is measured in human time measurements, and not the Aliena Standard Time Measurement Units.