Mongol Eagle Bearers are archers or swordsmen paired with a trained eagle that circles overhead and spots you. They fight like normal soldiers, but the bird makes sneaking up on their group much harder.
In melee they behave like any other archer or swordsman of their tier. The threat is the early warning: the eagle can blow your cover before you reach the camp.
Find the bearer and remove him first, from range if you can. Once he falls the eagle leaves and the rest of the group is back to normal stealth rules. Use Stone Stance if the bearer is a swordsman.
Bandits
Bandits are the island's common criminals, attacking villagers, Mongols, ronin and Jin alike. They are a secondary enemy in Izuhara during Act 1, poorly armed and predictable, but reckless enough to hurt you.
Eagle Tribe
The Eagle Tribe is the Mongol force that has taken Iki Island, led by the shaman Ankhsar Khatun, called the Eagle. They are the main enemy of the Iki Island expansion, and their purple-uniformed troops bring units you never see on Tsushima.
Mongol Archers
Mongol Archers are the bowmen at the back of every Mongol group. They are fragile up close but chip away at you from off-screen, so kill them early or close the distance fast.
Mongol Sappers
Mongol Sappers are bomb throwers who hang back and lob explosives into the fight. They are rare and fragile, so taking them out first stops the flashes and fire that make a group fight messy.