Alexander the Great conquered Sogdiana and Bactria in 329 BC, marrying Roxana, daughter of a local Bactrian chieftain. The conquest was supposedly of little help to Alexander as popular resistance was fierce, causing Alexander's army to be bogged down in the region that became the northern part of Hellenistic Greco-Bactrian Kingdom. For many centuries the region of Uzbekistan was ruled by Persian empires, including the Parthian and Sassanid Empires. In the first centuries, the northern territories of modern Uzbekistan were part of the Kangju nomad state. With the arrival of the Greeks, writing based on the Greek alphabet began to spread on the territory of Bactria and Sogdiana. As a result of archaeological research on the territory of Sogdiana and Bactria, fragments of pottery with Greek inscriptions have been found. In 2nd century BC China began to develop its silk trade with the West. Because of this trade on what became known as the Silk Route, Bukhara and Samarkand eventually became extremely wealthy cities, and at times Mawarannahr (Transoxiana) was one of the most influential and powerful Persian provinces of antiquity. In 350–375 AD, Sogdiana and Tashkent oasis were captured by the nomadic Xionite tribes who arrived from the steppe regions of Central Asia. Turkic Khaganate period The First Turkic Khaganate and migration of the population played a large role in the formation of a sedentary Turkic population in the territory of the oases of Central Asia in the 6th-8th centuries. In the Western Turkic Khaganate, in addition to various Turkic tribes, there were Iranian nomadic elements, which were gradually assimilated by the Turks. The urban population of Sogd, Khwarazm, Bactria was in close contact with the Turks. Turkic names and titles are found in Bactrian documents of the 7th-8th centuries: kagan, tapaglig eltabir, tarkhan, tudun, the names Kutlug Tapaglig Bilga savuk, Kara-tongi, Tongaspar, Turkic ethnic names: halach, Turk During the excavations of the Sogdian Penjikent, a fragment of a draft letter in the Sogdian language was discovered, in the text of which there is a Turkic name Turkash The Turkic population of the Fergana Valley had their own runic writing. The Turkic rulers of Ferghana, Tokharistan, Bukhara and Chach issued their own coins. The Turkic population of certain regions of Central Asia in the early Middle Ages had their own urban culture and used the proper Turkic terms, for example, baliq, which meant city. The Turks had a great