Defeat the Mongols
Make your way to the south of Jogaku Temple and you’ll chance upon Frozen Forest Crossroads, a small Outpost between your current base of operations and Fort Jogaku.
There’s not too much to this Outpost and you’ll find it to be one of the easier ones to liberate in Act III. There’s many grapple points that you can use to get around unseen but beware of the two Mongols accompanied by a dog that patrols outside, these can easily get behind you and cause trouble if you’re not careful. A lot of the enemies in general here will move about a lot so it’s almost easier to begin your assault here with a Stand Off, using the Sakai Armor fully upgraded and the right skills, you can almost kill all of the guards in one fell swoop. Once the Outpost is clear, be sure to search for the Mongol Artefact in the tent.