The north is inhabited by nomads, mostly Toubous. The Sui and Tang carried out very successful military campaigns against the steppe nomads. Those considered anti-social included alcoholics, homeless, gypsies, beggars, nomads, and prostitutes. The precise origin of the specific tribe of Arab nomads remains uncertain. The precise origin of this specific tribe of Arab nomads remains uncertain. The agriculturists received salt from the desert nomads. Such groups include hunter-gatherers, pastoral nomads (owning livestock), and tinkers or trader nomads. To protect against attacks from desert nomads, slaves were used as an escort. Folk art also includes the visual expressions of the wandering nomads. Persians referred to all northern nomads as Sakas. The Seljuks nomads, Turkish speaking and occasionally shamanistic. Shymkent grew as a market center for trade between Turkic nomads and the settled Sogdians. He was assigned to quell the cattle rustling between Uganda's Karamojong and Kenya's Turkana nomads. The two oriental levels are nomads and envoys. Tengriism was introduced by Turko-Mongol nomads.