Population Migration / Travel
The Arkenstone is brought back to its place in the Great Hall of Thrain, and with it returns a great part of Durin’s folk. They mine and tunnel the roots of the Mountain, enlarging the subterranean kingdom building huge halls and greater workshops. Another group of Dwarves is led eastward where they eventually settle in the Iron Hills. About this time, several clans of Northmen living along the River Running move north to be closer to the Lonely Mountain. They befriend the Dwarven colony of Erebor, attracted by the opportunities offered by the brisk trade with the Iron Hills. The city of Dale prospers, and the following hundred years see it become the capital of a strong kingdom extending far and wide to the East and South.