4000 years ago, a small group of Vedic Indians left the Indus valley & built a mighty empire in the middle east. They spoke Sanskrit & worshiped Indra-Mitra-Varuna. They had purely Rig Vedic personal names. A Mitanni palace now resurfaces from Mosul dam- https://edition.cnn.com/travel/article/iraq-palace-drought-scli-intl/index.html

Numerous Mitanni names have IndoAryan provenance.

Biriamazda- Priyamedha
Artasmara- Rtasmara
Tvaišaratha-Tveṣáratha
Indrauta-Indrota
Mittaratti- Mitrātithi
Dewatti-Devātithi

These suffixes & prefixes are predominantly found in later Rig Vedic books- implying the RV is older!

Earliest rulers of Mitanni king list are 'Kirta', Shuttarna & Parattarna

The capital was Waššukanni (Skt Vasu-khani-'Mine of wealth'). The city was lost to history & never found.

Zebu cattle entered the middle east around the same time as Mitanni! Did THEY bring it from India?

Well well..

"Bronze Age people transported bulls from the Indus Valley region to breed cattle across west Asia & east Africa, starting about 4000 years ago to combat increasing aridity, scientists reported"

Who were these 'people'?
Mitanni Indo-Aryans! https://www.deccanherald.com/national/indus-valley-bulls-sired-west-asia-stock-746537.html