You got me wrong, all the clan members can participate in the war if the clan is invited by the clan that is allied with them to participate in the war. The leader will know about it by being contacted in discord or having a notification in the forums that your clan has been selected to help (clan name) in your war if they don't show up it is fine, nothing changes. Please contact me on discord sir and tell me everything that you don't understand about this idea/suggestion so I can tell you everything that you need to know because I don't check forums that much, thank you.
Xaria##3197

Also if the allies decided to help they get a bit of points and exp if the clan that called them wins, also if you are considering of thinking it is a good idea and want to make Toribash support allying... please think more into it and think how you can make it perfect because I had to write this fast.