I found Dark Ages and it is a team based SMP with 30 players total. Everyone is split into teams of 5 and you try to build up your teams kingdom.
It stays pretty close to vanilla so it does not feel like a huge mod soup. Combat is changed with Better Combat so fights are a bigger deal.
To grow and defend your kingdom you use mods like Talhanations Recruits and Workers. There are also Siege Weapons and Small Ships plus Almiris Weapons so battles can get wild on land and on water.
Even with all the strategy and fighting the server wants people to stay civil and respectful. Role play is welcome and small beef is fine as long as it stays good natured.
