| April 2015 |
| 22/04/15 | The alliance 410 (today: 420) was founded. |
| Founding members::  Jason, BowWow, HOBBS and Lone Ranger. |
|  The alliance reaches a population more than 100. |
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| 23/04/15 | Leaving of:Jason. |
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| 25/04/15 | Leaving of:BowWow. |
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| 26/04/15 | Joining of:Keizer Ruben. |
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| 27/04/15 | Leaving of:Keizer Ruben. |
| The alliance reaches a population more than 1,000. |
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| 29/04/15 | Joining of:Alymaro, Buck Danny, woesj and TheWitch. |
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| 30/04/15 | Joining of:Alfred J. Kwak. |
| May 2015 |
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| 02/05/15 | The alliance reaches a population more than 5,000. |
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| 07/05/15 | The alliance reaches a population more than 10,000. |
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| 08/05/15 | Joining of:Maximus, Underground, Boze_Wolf, Dynamic Duo and Batfire. |
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| 09/05/15 | Joining of:BlackPanter and Rockstar. |
|  The alliance have their first conquest. |
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| 10/05/15 | Leaving of:Maximus. |
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| 11/05/15 | The alliance is now known as 420. |
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| 14/05/15 | The alliance has done over 5 conquests. |
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| 15/05/15 | Joining of:WickeD. |
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| 17/05/15 | The alliance has done over 10 conquests. |
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| 19/05/15 | The alliance reaches a population more than 50,000. |
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| 21/05/15 | Leaving of:woesj. |
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| 22/05/15 | The alliance has done over 20 conquests. |
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| 25/05/15 | Joining of:Droif1 and Aerodactyl. |
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| 27/05/15 | Joining of:knabbel and afhaalchinees. |
| The alliance reaches a population more than 100,000. |
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| 30/05/15 | Joining of:WSK. |
| The alliance has done over 50 conquests. |
| June 2015 |
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| 03/06/15 | Joining of:Charlie. |
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| 04/06/15 | Joining of:The Mountain. |
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| 08/06/15 | Joining of:Scrat. |
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| 11/06/15 | The alliance has done over 100 conquests. |
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| 18/06/15 | Leaving of:knabbel. |
| July 2015 |
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| 07/07/15 | Leaving of:TheWitch and WickeD. |
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| 08/07/15 | Deletion of:Dynamic Duo and Batfire. |
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| 11/07/15 | Deletion of:Alfred J. Kwak. |