| October 2017 | ||
| 27/10/17 | The alliance YSTERIA (today: PSTRIA) was founded. | |
Founding members::  Velisarious. | ||
 The alliance reaches a population more than 1,000. | ||
| 31/10/17 | The alliance is now known as PSTRIA. | |
| December 2017 | ||
| 31/12/17 | Deletion of:Velisarious. | |
| The alliance PSTRIA was canceled. | ||