Battle of Herosrun

The Battle of Herosrun (Hero's Run) was the battle that marked Halemar's return and claim for the throne. It was the second battle led by Halemar Udin. It ended in a stunning triumph for Halemar's forces.

Background
After Halemar's disappearance on his way Westmarch, the Thanons had regarded the Udin forces all but defeated and a small threat. Even with Halemar's alleged reappearance both his allies and the Thanons believed him to be broken by the Archonatan. Despite Halemar having a relatively insignificant force, Idralord Zeralk Thanon wished to exterminate the Udin's with one swift blow.

Zeralk had his own men numbering at 13,000, the men garrisoned in Idra Leone numbering at 6,000, 9,000 men from the Claypools and 1,200 from House Redwater. Despite Halemar having inferior numbers, Zeralk wished to humiliate him and therefore led his men from within the city. Zeralk with 20,000 men; House Malecast receiving orders to keep their men at the Claypools from Zerick Thanon.

Opposing Armies
Regmar Loyalists
 * Eastern and southern Idrasil
 * Central Idrasil
 * The majority of the Hintherlands - After Stalaheid Udin liberated Balhalas, the remaining Thanon loyal regions began to be drawn to the Udin cause.  This was due to the Hintherlords

Thanon Liberators

 * Western and northern Idrasil
 * Jadelords of the Hyperion Riverhalls
 * Durogoth
 * Sunbasa

The Battle
The Battle took place at the crest of Herosrun, later to be renamed the Lion's Den. Despite House Malecast of the Claypools refusing to send his men, Zeralk's numbers overwhelmed that of Halemar. However Herosrun was deliberately of a narrow, sloping pass, while open enough for movements, the terrain was chosen specifically by Halemar in hopes that his vanguard would easily break the uncertain Thanon center.

The Battle took place at the crossing of the Green Fork of the Trident that would later be known as the Ruby Ford. The Dornishmen, under the command of Prince Lewyn Martell was threatening Robert's left flank. Ser Lyn Corbray, picking up his wounded father's sword, led a charge and broke the Dornishmen. During the charge Ser Lyn encountered Prince Lewyn, who was already injured. In the ensuing fight, Ser Lyn killed Prince Lewyn.[3]  During the battle, Ser Barristan killed several men[4] and Robert himself joined the fighting and met Rhaegar in single combat.

Though many great lords and knights either lost their lives or made names for themselves in the fighting, the battle was decided when Robert killed Rhaegar with a blow of his warhammer. The blow was so hard that the rubies adorning Rhaegar's armor were shattered free to litter the river, giving the Ruby Ford its name.[5]  Leaderless, the Royal army broke and fled.