If you're interested in Aryan history, you might want to read the first chapter of The Seventh World of Chan Buddism. The first chapter has a bit of their history that anon hadn't read elsewhere.
"It was around 1500 B.C. that they demolished the immaculate cities of the Indus
Valley and, crossing that boundary of the then known world, began to trek across
northern India, singing their Vedic hymns and calling themselves Aryans which in their
language, there called Sanskrit, meant aristocrats' ornobles.' (They always thought of
themselves as noble: Erin, Iran and Aryan are cognates.) The small, dark and peaceful
Panis and Dasas farmers they met and conquered gaped at these strange tribes who held
their language and their cows so sacred. "
https://zbohy.zatma.org/common/downloads/SeventhWorldOfChanBuddhism.pdf