His forces drove the Assyrians back across the pre-war border and deep into the Assyrian heartlands, reconquering major towns and cities around Lake Urmia, including Mushashir, Ushnu, and Tepe, and conquering the territory as far south as the city of Nimrud on the Tigris River. These victories forced the Assyrians to accept a lengthy peace and cede large tracts of territory north of the Tigris. The remainder of Argishti's lengthy reign was characterized by a "Golden Age", a period of lengthy peace and economic prosperity, which carried into the reigns of Argishti's two successors, his son Rusa II and his grandson Sarduri III.
His forces pushed the Assyrians back across the pre-war border and into the heart of their territory, recapturing key towns and cities near Lake Urmia, including Mushashir, Ushnu, and Tepe, and extending their control as far south as Nimrud on the Tigris River. These successes compelled the Assyrians to accept a prolonged peace and relinquish significant territories north of the Tigris. The remainder of Argishti's extended reign was marked by a "Golden Age", a period of enduring peace and economic flourishing, which continued into the reigns of his two successors, his son Rusa II and his grandson Sarduri III.