A question about Clans

Lert: Some clans are just for casual people wanting to play and have fun. Some clans want to dabble a bit in strongholds and team battles, and anyone in that clan needs at least some tier 6 or tier 8 tanks. Some clans are clan wars clans, and require their players to not only have 4+ tier 10 tanks, but also possess a certain amount of skill at driving them. And some clans are really hard core competitive play clans that require 12+ tier 10's and incredibly skilled players.