Túchanar of Nidavellir discovers the Ironwood forests north in Jotunheim and brings it home to discover its wondrous properties. From the Jotunheim mythology
Humans venture north to create settlements in Jotunheim. Settlement stops when the Iron War begins in 250, but there are some outposts still being built and maintained until 320 when the Wall of Winds is erected.
From the Strongfell mythology
From the Jotunheim mythology The Iron War
A group of human guards at an outpost in Jotunheim are lost beyond the wall of winds, and turn to cannibalism...and worse