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How did Hattusilis I expand the Hittite kingdom?

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Anatolia Abandoned cave dwellings in Cappadocia, Anatolia, Turkey.

Hattusilis I expanded the Hittite kingdom by shifting his focus beyond the unification of the Hittite heartland, a task primarily associated with his predecessor, Labarnas I.

To broaden the reach of his realm, Hattusilis I penetrated the Taurus range and launched invasions into northern Syria, where he attacked the kingdom of Yamhad. Additionally, he moved the Hittite capital from Kussara to Hattusa, a strategic decision that coincided with his adoption of the name Hattusilis.1