| May 2019 | ||
| 20/05/19 | The alliance ITA (today: OMA) was founded. | |
Founding members::  stay tuned and Maffinisme. | ||
| Leaving of:stay tuned. | ||
 The alliance reaches a population more than 1,000. | ||
| 21/05/19 | Joining of:osikss. | |
| August 2019 | ||
| 22/08/19 | Deletion of:osikss. | |
| September 2019 | ||
| 01/09/19 | The alliance is now known as OMA. | |