| December 2019 |
| 16/12/19 | The alliance BLABLA (today: GROM) was founded. |
| Founding members::  BLABLA. |
|  The alliance reaches a population more than 100. |
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| 17/12/19 | Joining of:mutalisk and ralf777. |
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| 18/12/19 | The alliance is now known as GROM. |
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| 19/12/19 | Joining of:ana86. |
| Leaving of:BLABLA. |
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| 22/12/19 | Joining of:BLABLA. |
| The alliance reaches a population more than 1,000. |
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| 23/12/19 | Joining of:Petej. |
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| 25/12/19 | Joining of:JARO.G. |
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| 26/12/19 | Joining of:Krka. |
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| 27/12/19 | Leaving of:Petej. |
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| 28/12/19 | Joining of:Bartulek. |
| The alliance reaches a population more than 5,000. |
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| 29/12/19 | Joining of:sunshine18x. |
| Leaving of:mutalisk. |
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| 31/12/19 | Leaving of:ana86 and sunshine18x. |
| January 2020 |
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| 01/01/20 | Leaving of:BLABLA and Krka. |
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| 02/01/20 | Leaving of:JARO.G. |
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| 27/01/20 | Deletion of:ralf777. |
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| 28/01/20 | Deletion of:Bartulek. |
| The alliance GROM was canceled. |