Around 3000 BCE, the ancestors of Iranians first migrated from their Central Asian homeland to the Iranian Plateau. They initially had to face the local population of the land like the Kassites and Elamites. The warrior like Aryans managed to take control of most of the land through both war and peaceful means. The integration of Aryans with the locals and the settlement of the tribes all around the plateau gave raise to the first Iranian civilizations. Throughout its long history, people of Iran have intermarried with Greeks, Arabs, Mongols, Turks, and other tribes. Today, most of the population has similar characteristics and obvious differences are rare. The worthy exceptions are the members of the semi-nomadic Torkoman tribes who show clear Turko-Mongolian anatomies