Clan with no obligations and no demands. Just play random and complete Tour of Duty missions. You can check them in tab "CLAN" > "Tour Missions". Also don't forget to claim rewards manualy in the same tab, or you can install mod for autoclaim: wgmods.net/6711 (place it folder C:/WoT/mods/1.3x.x.x). Playing platoon will boost your progress.