That wrestling is so unbelievably old. Nubia was home of various empires and states as early as 3500 BC and was for long times under the rule of Egypt, but there were also times when the Nubians did rule over the Egyptians (during the times of the Kush Empire, which existed between 1000 BC till 300 BC). So there was a 3000 year long cultural interdependence and cultural exchange. So Nubian wrestling started to get known to the Egyptians.