Arnuwanda was the eldest surviving son of the Hittite great king
Šuppiluliuma I and his first wife,
Ḫenti, herself apparently the daughter of
Tudḫaliya III (sometimes called Tudḫaliya II) and granddaughter of
Arnuwanda I.
Crown Prince Arnuwanda was declared his father's heir apparent (
tuḫkanti) and is attested as such in references to several events taking place during Šuppiluliuma's reign. Arnuwanda's absence from the record in the earliest events of his father's reign suggests he was too young to participate in them at the time. Together with his father, mother, and uncle Zida, Arnuwanda was mentioned in the description of the formal installation of his younger brother Telipinu as priest (and governor) of
Kizzuwatna.
The Great Syrian Wars By the time of the Six-Year War against
Tushratta of the
Mittanians, Arnuwanda was ready for military command. When the Mittanians defeated a Hittite contingent in northern Syria, Šuppiluliuma dispatched against them advance forces under Arnuwanda and his uncle Zida; they chased off the enemy, allowing Šuppiluliuma to undertake the ultimately successful siege of
Carchemish. Following the murder of Arnuwanda’s younger brother
Zannanza en route to become king of
Egypt, Šuppiluluma sent Arnuwanda to raid and pillage the Egyptian possessions in southern Syria. Arnuwanda met with success, but the large number of captives that he brought back with him carried with them
plague, which would ravage Hittite society for at least two decades, according to the
Plague Prayers of Arnuwanda’s brother and eventual successor Muršili II. ==Reign==