peak maple
the only ones shown in SWS so far are the Sicklewrath and they are just former farmers that got founded pretty recently.
Sicklewrath: small lightweight splash damage units, their founder is Sicklebear. they live in northern no-man's land
from SW1 there are the natives with the feathers on their head, their redesign in SWL put sickles on their spears thus i gave them the name Sicklerods
Sicklerods: strong lightweight splash damage tanks, their founder is unknown. they live in the wildlands in former archidon and swordwrath territory
SWL added skins after a few updates and one of them is the savage skin. i would categorise them as the first members of the united tribes, originally known as the united savage tribes.
Savage units: the classic cast but they're faster and are strong against to knockback, their founder is a Shaman. they live near the magikill mountains south-east of no-man's land
another skin is the undead one. they call themselves the masters of the dead and Marrowkai despises them for that.
Undead tribes: they have an enchantment that turns their fallen warriors into deads. their founder is a magikill. they live somewhere in chaos lands
bonus missions added some more special units one of them are the bloodblade swordwrath
BloodBlade Swordwrath: powerful lightweight units with big single damage. they can absorb blood with their swords (they heal with every kill). their leader is Baron. they live eastern chaos lands
another bonus tribe unit are the toxophilite archers. some later missions added swordwrath and speartons.
Toxophilites: quickbow archers. the other two are pretty normal. their founder is unknown. they live somewhere in south-inamorta.
stark heart
frail basalt