Einherjar are the portion of the war-dead brought by the Valkyries to Odin's hall, Valhalla, where they feast nightly and practice fighting in anticipation of Ragnarok. 

Cauldron articles about the Einherjar:

  * [url=http://www.ecauldron.net/einherjar.php]Einherjar, Odin's Chosen[/url]
  * [url=http://www.ecauldron.net/einherjarx.php]Einherjar Exercise[/url]