The chariot had initially been introduced to the Middle East by Indo-Iranians. The Hyksos were also responsible for introducing the horse into Egypt, and rode them in all their wars. Chariots had earlier played a key role in the conquests by the Hittites in Anatolia, the Indo-Iranians in northern India, and the Mycenaeans in Greece.
Contemporary with the Hyksos, there was a widespread Indo-Aryan expansion in central and south Asia. The arrival of the Hyksos in Egypt, along with the arrival of the Hurrians in Syria and the Kassites in Babylonia, has been connected with this migration. The Hyksos used the same horsedrawn chariot as the Indo-Aryans, and Egyptian sources mention a rapid conquest. While the majority of the Hyksos are thought to have been Semitic, the Hyksos are usually believed to have contained Indo-Europeans and Hurrians among the leadership. According to William L. Ochsenwald, it is certain that the Hyksos contained Hurrians who were under Indo-Aryan rule and influence. Claude Frédéric-Armand Schaeffer states that the Hyksos were related to the Hurrians and the Mitanni. While the names of the earliest or "Lesser Hyksos" rulers are Semitic, names of later or "Greater Hyksos" rulers have been identified as having Indo-Aryan, Hurrian or uncertain etymologies. These names are associated with the second wave of Hyksos invasion in the 17th century BC, which was composed of a mixed group of well organized warriors that were different from the earlier Asiatic Hyksos princes that arrived in Egypt in the 18th century BC. John Bright cites this as evidence that there might have been an Indo-Aryan element among the Hyksos. Philip Khuri Hitti wrote that the Hyksos were a mixed group which in addition to Semites included Hurrians, Hittites, Mitanni and Habiru. Hitti connected the arrival of the Hyksos with the Indo-European migrations at the time, and cites the introduction of the horse and the chariot by them to Egypt as evidence of their Indo-European connections.