| March 2015 | ||
| 06/03/15 | The alliance TTR (today: OCE) was founded. | |
Founding members::  Pedak, carey15, DovahDouche and AntonioJuliao. | ||
 The alliance reaches a population more than 100. | ||
| 10/03/15 | The alliance reaches a population more than 1,000. | |
| 17/03/15 | The alliance is now known as OCE. | |
| April 2015 | ||
| 01/04/15 | Deletion of:Pedak. | |
| 19/04/15 | Deletion of:AntonioJuliao. | |
| May 2015 | ||
| 09/05/15 | Deletion of:carey15. | |