- For the primary universe counterpart, see Eugenics Wars.
In the mirror universe, the Eugenics Wars were a series of conflicts that took place on Earth during the 20th and 21st centuries.
During that time, genetically engineered beings such as Khan Noonien Singh and others had risen to power. However, they were not overthrown or forced off Terra but instead they managed to command several empires that were spread across several continents on Earth. These dynasties eventually turned on one another where they engaged in territorial warfare which saw the deployment of slow moving ion driven space craft that were adapted from DY-100 sleeper ships. Such craft allowed a means of deploying nuclear weapons which would not be shot down by anti-missile systems or particle beams. Numerous improvements were made to the ion based propulsion systems from the research teams of the competing factions which ultimately led to the destruction of the dictator's dynasties with the death of a great many Terrans in the attacks. Though the planet was devastated, the technology for relativistic space travel remained though the survivors were more concerned with restoring their civilization from the downfall of the Engineered.
However, they never forgot the memory of the empires that were forged in the past and of the time when individuals of power ruled over the common people. Thus, the slowly developing governments once more developed into empires which merged into a single empire. The environment of Terra by this point had greatly suffered with conditions being strictly regulated to ensure that there was enough food, housing and employment for the people. In time, the planet began to recover ecologically once more but the minds of the Terran people became a cold and non-trusting race who looked to the stars for a new home and ensure that they never face extinction again. (TNG novel: Dark Mirror)