| May 2018 |
| 15/05/18 | The alliance X666 (today: CRO) was founded. |
| Founding members::  lowbro, stribor, BLACKDEVILX666 and Tincy. |
|  The alliance reaches a population more than 100. |
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| 17/05/18 | The alliance is now known as X-666. |
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| 18/05/18 | Joining of:jerko. |
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| 19/05/18 | Joining of:qwqw and NuclearBadger8. |
| The alliance reaches a population more than 1,000. |
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| 20/05/18 | Joining of:HroŠč, Garava, Aragorn, Fićko, mavre and branko. |
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| 21/05/18 | Joining of:Mixon and Aneurysm. |
| Leaving of:Mixon. |
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| 22/05/18 | Joining of:igorvk. |
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| 23/05/18 | Leaving of:NuclearBadger8. |
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| 25/05/18 | Leaving of:HroŠč. |
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| 26/05/18 | Leaving of:jerko. |
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| 27/05/18 | Joining of:Miracle, Crveni barun and Perun. |
| The alliance reaches a population more than 5,000. |
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| 28/05/18 | Joining of:DarknessReaper. |
| Leaving of:Aragorn. |
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| 29/05/18 | Joining of:Vragec and reba 9. |
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| 30/05/18 | Joining of:Aragorn, Aronicus, Twisted, ivandrk, Drazic, svistemojekuje, svarog, Lihac, Gazamor, Bazooka and tufke. |
| The alliance reaches a population more than 10,000. |
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| 31/05/18 | Leaving of:Garava Miracle Crveni barun Perun Aragorn and Lihac. |
| June 2018 |
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| 02/06/18 | Leaving of:Fićko svistemojekuje svarog and Bazooka. |
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| 03/06/18 | The alliance is now known as 666999. |
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| 04/06/18 | Leaving of:DarknessReaper and Gazamor. |
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| 05/06/18 | Deletion of:Aneurysm. |
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| 06/06/18 | Leaving of:ivandrk. |
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| 11/06/18 | Leaving of:lowbro stribor BLACKDEVILX666 Tincy qwqw mavre branko Vragec Aronicus Twisted and tufke. |
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| 12/06/18 | Leaving of:reba 9. |
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| 14/06/18 | Leaving of:Drazic. |
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| 16/06/18 | The alliance is now known as CRO. |
| December 2018 |
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| 12/12/18 | Deletion of:igorvk. |
| The alliance CRO was canceled. |