Mitannian king Shuttarna II had been succeeded…
1341 BCE to 1330 BCE
Mitannian king Shuttarna II had been succeeded by his son Tushratta or possibly Artashumara, briefly, under dubious circumstances.
At the beginning of Tushratta’s reign, the Hittite King Suppiluliuma I reconquers Kizzuwatna, then invades the western part of the Euphrates valley and conquers the Amurru and Nuhašše in Hanigalbat.
According to the Suppiluliuma-Shattiwaza treaty, Suppiluliuma had made a treaty with Artatama, a rival of Tushratta.
Nothing is known of Artatama's previous life or connection, if any, to the royal family.
The document calls him king of the Hurrians, while Tushratta is given the title of "King of Mitanni", which must have disagreed with Tushratta.
Suppiluliuma starts to plunder the lands of the west bank of the Euphrates river and he annexes Mount Lebanon.
Tushratta threatens to raid beyond the Euphrates if even a single lamb or kid is stolen.
Suppiluliuma then recounts how the land of Isuwa on the upper Euphrates had seceded in the time of his grandfather.
Attempts to conquer it failed.
In the time of his father, other cities rebelled.
Suppiluliuma claims to have defeated them, but the survivors had fled to the territory of Isuwa that must have been part of Tushratta's realm.
A clause to return fugitives was part of many treaties made at the time, so possibly the harboring of fugitives by Isuwa formed the pretext for the Hittite invasion.
A Hittite army crosses the border, enters Isuwa and returns the fugitives (or deserters or exile governments) to Hittite rule.
"I freed the lands which I captured; they dwelt in their places.
All the people whom I released rejoined their peoples and Hatti incorporated their territories," Suppiluliuma will later boast.
The Hittite army then marches through various districts towards the Mitanni capital of Washshukanni.
Suppiluliumas claims to have plundered the district and to have brought loot, captives, cattle, sheep and horses back to Hatti.
He also claims that Tushratta fled, but obviously he failed to capture the capital.
While the campaign has weakened Tushratta's kingdom, he retains his throne.
In a second campaign, the Hittites again cross the Euphrates and subdue Halab, Mukish, Niya, Arahati, Apina, and Qatna as well as some cities whose names have not been preserved.
Charioteers are mentioned among the booty from Arahati, who are brought to Hatti together with all their possessions.
While it is common practice to incorporate enemy soldiers in the army, this might point to a Hittite attempt to counter the most potent weapon of the Mitanni, the war-chariots, by building up or strengthening their own chariot forces.
Tushratta had possibly suspected Hittite intentions on his kingdom, for the Amarna letters include several tablets from Tushratta concerning the marriage of his daughter Tadukhipa with Akhenaten, explicitly to solidify an alliance with the Egyptian kingdom.
However, when Suppiluliumas invades his kingdom, the Egyptians fail to respond in time—perhaps because of the sudden death of Akhenaten, and the resulting struggle for control of the Egyptian throne.