| February 2009 | ||
| 21/02/09 | The alliance oAcC (today: oAcB) was founded. | |
Founding members::  acasa s2. | ||
 The alliance reaches a population more than 100. | ||
| March 2009 | ||
| 03/03/09 | Joining of:gili96. | |
| 04/03/09 | Joining of:romanoleo. | |
| 07/03/09 | The alliance is now known as oAcB. | |
| 11/03/09 | Joining of:madalin.stoica. | |
| The alliance reaches a population more than 1,000. | ||
| 12/03/09 | Leaving of:madalin.stoica. | |
| April 2009 | ||
| 05/04/09 | Leaving of:gili96. | |
| 23/04/09 | Deletion of:acasa s2. | |