| June 2009 | ||
| 04/06/09 | The alliance T-b (today: BA_ER) was founded. | |
Founding members::  Osterhase, Basti2, Basti, Staubfinger, Hulal7, Hulal5, Hulal1 and Hulal. | ||
| Leaving of:Osterhase. | ||
 The alliance reaches a population more than 100. | ||
| 05/06/09 | Joining of:Erwin2. | |
| Leaving of:Hulal5 Hulal1 and Hulal. | ||
| 07/06/09 | Joining of:Nathea. | |
| Leaving of:Staubfinger. | ||
| 08/06/09 | Joining of:Treely. | |
| 09/06/09 | The alliance is now known as BA_ER. | |
| 11/06/09 | Joining of:Günta. | |
| Leaving of:Hulal7. | ||
| 12/06/09 | Joining of:Basti3. | |
| 14/06/09 | Joining of:zuendmeister. | |
| Deletion of:Basti3. | ||
| 17/06/09 | Joining of:T-pain. | |