Kin-strife

The civil war that erupted in Gondor in the middle of the Third Age. Eldacar, was the son of King Valacar and Vidumavi of the Northmen. Because he was not descended in direct line from Gondorian stock, his right to the Kingship was therefore challenged by Castamir, who himself had some claim on the throne. Castamir succeeded in usurping the Kingship, but held it just ten years before Eldacar reclaimed it and restored order.