The Hittite connection is based chiefly on the following evidence. One of the gods of the Mitanni rulers was Teshup, who is identical with Tarku, the Thor of Asia Minor. The raiders who in 1800 B.C. entered Babylon, set fire to E-sagila, and carried off Merodach and his consort Zerpanitum, were called the Hatti. The images of these deities were afterwards obtained from Khani (Mitanni).
At a later period, when we come to know more about Mitanni from the letters of one of its kings to two Egyptian Pharaohs, and the Winckler tablets from Bog-haz-Köi, it is found that its military aristocracy spoke an Indo-European language, as is shown by the names of their kings--Saushatar, Artatama, Sutarna, Artashshumara, Tushratta, and Mattiuza. They worshipped the following deities:
Mi-it-ra, Uru-w-na, In-da-ra, and Na-sa-at-ti-ia--
Mitra, Varuna, Indra, and Nasatyau (the "Twin Aswins" = Castor and Pollux)--whose names have been deciphered by Winckler. These gods were also imported into India by the Vedic Aryans. The Mitanni tribe (the military aristocracy probably) was called "Kharri", and some philologists are of opinion that it is identical with "Arya", which was "the normal designation in Vedic literature from the Rigveda onwards of an Aryan of the three upper classes".[[293]] Mitanni signifies "the river lands", and the descendants of its inhabitants, who lived in Cappadocia, were called by the Greeks "Mattienoi". "They are possibly", says Dr. Haddon, "the ancestors of the modern Kurds",[[294]] a conspicuously long-headed people, proverbial, like the ancient Aryo-Indians and the Gauls, for their hospitality and their raiding propensities.
It would appear that the Mitannian invasion of northern Mesopotamia and the Aryan invasion of India represented two streams of diverging migrations from a common cultural centre, and that the separate groups of wanderers mingled with other stocks with whom they came into contact. Tribes of Aryan speech were associated with the Kassite invaders of Babylon, who took possession of northern Babylonia soon after the disastrous Hittite raid. It is believed that they came from the east through the highlands of Elam.
For a period, the dating of which is uncertain, the Mitannians were overlords of part of Assyria, including Nineveh and even Asshur, as well as the district called "Musri" by the Assyrians, and part of Cappadocia. They also occupied the cities of Harran and Kadesh. Probably they owed their great military successes to their cavalry. The horse became common in Babylon during the Kassite Dynasty, which followed the Hammurabi, and was there called "the ass of the east", a name which suggests whence the Kassites and Mitannians came.
The westward movement of the Mitannians in the second millennium B.C. may have been in progress prior to the Kassite conquest of Babylon and the Hyksos invasion of Egypt. Their relations in Mesopotamia and Syria with the Hittites and the Amorites are obscure. Perhaps they were for a time the overlords of the Hittites. At any rate it is of interest to note that when Thothmes III struck at the last Hyksos stronghold during his long Syrian campaign of about twenty years' duration, his operations were directly against Kadesh on the Orontes, which was then held by his fierce enemies the Mitannians of Naharina.[[295]]
During the Hyksos Age the horse was introduced into Egypt. Indeed the Hyksos conquest was probably due to the use of the horse, which was domesticated, as the Pumpelly expedition has ascertained, at a remote period in Turkestan, whence it may have been obtained by the horse-sacrificing Aryo-Indians and the horse-sacrificing ancestors of the Siberian Buriats.
If the Mitanni rulers were not overlords of the Hittites about 1800 B.C., the two peoples may have been military allies of the Kassites. Some writers suggest, indeed, that the Kassites came from Mitanni. Another view is that the Mitannians were the Aryan allies of the Kassites who entered Babylon from the Elamite highlands, and that they afterwards conquered Mesopotamia and part of Cappadocia prior to the Hyksos conquest of Egypt. A third solution of the problem is that the Aryan rulers of the Mitannian Hittites were the overlords of northern Babylonia, which they included in their Mesopotamian empire for a century before the Kassites achieved political supremacy in the Tigro-Euphrates valley, and that they were also the leaders of the Hyksos invasion of Egypt, which they accomplished with the assistance of their Hittite and Amoritic allies.
The first Kassite king of Babylonia of whom we have knowledge was Gandash. He adopted the old Akkadian title, "king of the four quarters", as well as the title "king of Sumer and Akkad", first used by the rulers of the Dynasty of Ur. Nippur appears to have been selected by Gandash as his capital, which suggests that his war and storm god, Shuqamuna, was identified with Bel Enlil, who as a "world giant" has much in common with the northern hammer gods. After reigning for sixteen years, Gandash was succeeded by his son, Agum the Great, who sat on the throne for twenty-two years. The great-grandson of Agum the Great was Agum II, and not until his reign were the statues of Merodach and his consort Zerpanitum brought back to the city of Babylon. This monarch recorded that, in response to the oracle of Shamash, the sun god, he sent to the distant land of Khani (Mitanni) for the great deity and his consort. Babylon would therefore appear to have been deprived of Merodach for about two centuries. The Hittite-Mitanni raid is dated about 1800 B.C., and the rise of Gandash, the Kassite, about 1700 B.C. At least a century elapsed between the reigns of Gandash and Agum II. These calculations do not coincide, it will be noted, with the statement in a Babylonian hymn, that Merodach remained in the land of the Hatti for twenty-four years, which, however, may be either a priestly fiction or a reference to a later conquest. The period which followed the fall of the Hammurabi Dynasty of Babylonia is as obscure as the Hyksos Age of Egypt.