www.turkmenistan.ru/ June 8th … Turkmenistan in Russia, excavations in the capital city Ashgabat have found there was a settlement there going back to the 6th millennium BC, defined as Neolithic and contemporary with Neolithic farming communities in Iran, Baluchistan, and the Fertile Crescent.
http://archaeology.about.com/od/yterms.qt/yeha.htm?nl=1 Yeha is a first millennium BC site in Ethiopia preceding the Aksum culture. It had trading contacts with southern Arabia.