I encourage all members to send out Member invites to this Steam Group... People on your friend's list, people from other Steam Groups like this one. On Some Profile page it is to right of the Add Friend/Message friend button tab and your scroll down to invite to group and when you click on invite to group you select this one and you will recognize it with the Avatar Picture and the long phrase of the title of the Steam Group...

Any member or anyone else can join this Group's Clan on Shogun Total War 2.
This is the Url for the clan page on Shogun2 http://steamproxy.com/groups/TWSNEI