So what you're looking for is a regiment.
A regiment is a community of people regrouped with for the major part a rank for each player.
Sometimes, in the regiment, you'll have event like Line Battles where you'll have to obey the 1 st superior in comand ofthe line of your regiment.
If you wish to join a regiment, you should throw an eye over here: http://www.fsegames.eu/forum/index.php?board=21.0 .
Else, currently being part of the 84e Régiment D'Infanterie De Ligne, I would advise you to join us.
If you're interested in joining the 84e, please follow this link: http://84e-forum.eu/ and post your application in the recruitement office.