The so-called Old Hittite Kingdom maintains internal strength and military security for the first century and a half of its existence, achieving the enduring political unification of Anatolia.

Whereas the earlier Hittite kings had based their court at Neša, Labarna II is the first king of the Hittites to reign from Hattusa, the modern Bogazkale, where he builds a hilltop citadel and takes the throne name of Hattusilis.

Under his rule, the Hittites have penetrated south to the plains of northern Syria near Antioch and southwest in Anatolia through Cilicia, incurring the enmity of the Syrians of Aleppo and the Hurrians also: his “Annals” tell of the king’s penetrations into that region and eastward across the Euphates River to Mesopotamia Cilicia, having come under Hurrian control about 1660, had, with help from Aleppo, been reacquired about 1556 in a battle that proves fatal to Hattusilis.

His military capital, Hattusa, remains the principal Hittite administrative center.

His adopted son and heir ascends the Hittite throne as Mursilis I, and soon launching a series of forays down the Euphrates Valley.