In Norse mythology, Odin sends his Valkyries to select the bravest warriors on Midgard. These brave warriors are then chosen by the valkyrie to die in battle and accompany them to Asgard. Once they are in Asgard, the fallen brave are divided between Odin and Freya. Those chosen by Odin are called Einherjar, which means One-army in Old Norse.
The sole purpose of the einherjar is to fight as Odin's warriors. Every day they train and prepare for the biggest battle in Norse Mythology; Ragnarök, meaning "Fate of the Gods".
The einherjar stay at Odin’s hall called Valhalla, the 'Hall of the fallen'. In Vallhalla, the einherjar will be taken care of by the valkyrie, who will give the warriors mead and ensure that they thrive.
In the morning when the einherjer wake, they ready themselves with their armor, helmet, shield and weapons, and then go to iðavöllr for combat training. The einherjar continue their brutal combat training until sundown, when the fallen arise unscathed, and all ride back to Valhalla as good friends, where the valkyrie serve mead and meat from the boar Sæhrímnir, to the einherjar warriors.
The einherjar symbol is the Valknut, a symbol consisting of three interlocked triangles. Valknut is from the Old Norse ‘valras’ meaning 'killed warriors’ and ‘knut’ meaning 'knot '. This symbol found on various Norse and Germanic places, like runestones and the Osberg ship.