| 15th century | Tsiktral lands on the surface of Euphrosyne and starts colonizing it. |
| year 2315 | HMC purchases the planet and lands its first completely autonomous robotic colonial ship on it. It also starts a fierce war with Tsiktral. |
| year 2371 | The first human settlement RS-0 is built and opened on Euphrosyne by HMC |
| year 2393 | The host incident ravages RS-0 |
| year 2476 | Interstellar war between Protectorate and Vanguard empires breaks out. |
| year 2479 | Vanguard fleet besieges the planet from the orbit and land a massive land force to take it over., but the land invasion fails terribly. |
| year 2480 | Vanguard starships nuke the planet heavily creating an ecological catastrophe. Bombing also causes a massive planet scale anomalous rupture event ripping apart one of the Euphrosyne’s moons. They deem rescue mission too risky and leave the orbit and their landed troops stranded. The planet is completely isolated now. |
| year 2603 | now. |