| April 2011 | ||
| 17/04/11 | The alliance OBS was founded. | |
Founding members::  v2wkxd, PecioR and OrMaG. | ||
 The alliance reaches a population more than 100. | ||
| 18/04/11 | Joining of:stachu and tomi0505. | |
| Leaving of:v2wkxd PecioR OrMaG and stachu. | ||
| 19/04/11 | Joining of:zaku and siwy1702. | |
| Leaving of:siwy1702. | ||
| Deletion of:zaku. | ||
| 21/04/11 | Joining of:shirlay. | |
| May 2011 | ||
| 01/05/11 | Deletion of:shirlay. | |