So the Enemy comes, sets up camp in the north, rallies all orcs everywhere to his banner, begins capturing and enslaving everyone. Wipes out most of the northwestern communities and the entire east, has the Falas in bad straits, Doriath's holding on because they have powerful magic.
Now there's the Noldor. We lived in Valinor, which is the continent just over. Before the Enemy arrived here he destroyed the Trees so nothing could grow in Valinor anymore, killed the old King, sparked a civil war, and took some powerful magic weapons. That's the civil war that the current King ended, the minute his father got killed, by assassinating a select few people and forcing loyalty oaths at swordpoint from a lot more, and then with a united host fought his way out of Valinor, landed here, conquered back everything the orcs had taken - Valinor had more advanced weapons - and then found the Enemy beyond his capabilities. So he settled down, started building, plans to absorb the whole continent politically and then take the fight back to the Enemy. Men came across the mountains in desperate straits because the war's even worse over there, and he made them all his vassals and is I think taking advantage of how rapidly their population increases, compared to ours.
He's - very straightforward to work with, he makes it clear what will make you his enemy and that that's not to your advantage. He also murdered my parents and keeps my brother chained to his wall, so.