Right and an only slightly later and little further east group, the Sintashta, (a semi-pastoral horse culture) refinded horse herding and horse management.
They invented the spoked wheel. The wheel had already been around but was a large wooden disc, so large and heavy that a cart had to be pulled by oxen and was very slow.
The Sintashta also invented the chariot which was light and very fast because of the spoked wheel. It was a real giant step for migration and warfare. These people are VERY interesting. Only part of the year they lived in settlements which were circular, with all dwellings joined, and acessible from the side walls. Each dwelling had its own well and forge.
MUST SEE... https://www.youtube.com/clip/UgkxCgJKr9MigLtBhimMxNMrG6X5Q2rsq65L
Thanks for that link I’ll take a look.