| November 2017 |
| 17/11/17 | The alliance PL Powes (today: PS O) was founded. |
| Founding members::  Buba, Chronos, MarWin, LiderFiveTeam, Aktywne Farmy, winci, budek, noitotyle, sobol01, sredni, Wojnar, Spartanie, aAlfa17, anis998, kamil0710, runaway_rabbit, JuJa, kmina, Wezno, merii20, Topix, SmokTT, Bezlitośni, Des, sako, Agitka, Timon & Pumba and Sandacz90. |
|  The alliance reaches a population more than 1,000. |
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| 20/11/17 | The alliance is now known as PS O. |
| The alliance reaches a population more than 5,000. |
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| 21/11/17 | The alliance reaches a population more than 10,000. |
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| 24/11/17 | Leaving of:Buba Chronos MarWin LiderFiveTeam Aktywne Farmy winci noitotyle sobol01 sredni Wojnar Spartanie aAlfa17 anis998 kamil0710 runaway_rabbit JuJa Wezno merii20 Topix SmokTT Bezlitośni Des sako Agitka Timon & Pumba and Sandacz90. |
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| 25/11/17 | Joining of:Ariel_GT, 19memo90 and blant. |
| The alliance PS O was canceled. |