"Our results re- veal that these expansions from ~5000 yr B.P. onward also came too late for the language chronology of Indo-European divergence. They are consistent, however, with an ultimate homeland south of the Caucasus and a sub- sequent branch northward onto the steppe, as a secondary homeland for some branches of Indo-European entering Europe with the later Corded Ware–associated expansions."
Yamnaya culture

January 1, 1970