Asgard

Background
Asgard is the home of the Aesir gods, and the Asgardians. The planet is lush and fertile, with the city of Asgard at it's center. The hall of Valhalla lay in the enter of the city. It is owned by Modi, brother of Magni.

The First Asgardian Empire
The Asgardian empire was ruled by the allfather Odin and the other Aesir and Vanir gods. The empire spanned from Asgard to Midgard, and was prosperous.

Ragnarok
The first empire of Asgard fell when Surtyr and his army of giants from Jotunheim attacked Asgard, and the subsequent burning of the nine realms. Odin and Tyr were killed by the wolf Fenrir. Thor was killed by the world serpent, Jormungandr.

Loki was evenually killed by Heimdall the watcher and Asgard burned with the rest of the realms. Surtyr fled back to Jotunheim with his army, and waited.