Elendil held both kingdoms. Arnor was actually the seat of the High Kingdom, due to its proximity to Gil-Galad’s own kingdom.
After Isildur’s death the rule was split, but Arnor never recovered from the war and gradually declined until its collapse fighting Angmar. Gondor would in turn defeat the Witch-King leading to the collapse of Angmar and the state of the region in LotR where everything is uninhabited or under local rule.
*the absent King of Arnor
Elendil held both kingdoms. Arnor was actually the seat of the High Kingdom, due to its proximity to Gil-Galad’s own kingdom.
After Isildur’s death the rule was split, but Arnor never recovered from the war and gradually declined until its collapse fighting Angmar. Gondor would in turn defeat the Witch-King leading to the collapse of Angmar and the state of the region in LotR where everything is uninhabited or under local rule.
You are quite correct! My mistake.