List of ancient great powers
The Sassanid Empire is the name used for the fourth Iranian dynasty, and the second Persian Empire (226–651). The empire's territory encompassed all of today's Iran, Iraq, Armenia, Afghanistan, eastern parts of Turkey, and parts of Syria, Pakistan, and large parts of Caucasia, Central Asia and Arabia. During Khosrow II's rule in 590–628 Egypt, Jordan, Palestine, Lebanon were also briefly annexed to the Empire, as well as far west as western Asia Minor. The Sassanid era, encompassing the length of the Late Antiquity period, is considered to be one of the most important and influential historical periods in Iran. In many ways the Sassanid period witnessed the highest achievement of Persian civilization. The empire is furthermore known for being the arch-rival of the neighboring Roman–Byzantine Empire for a period of over 400 years. As the Parthians were replaced by the Sassanids, they carried on the already century long lasting Roman–Persian Wars, which would eventually become the longest conflict in human history.
History of Tajikistan
They created a powerful empire that succeeded in making Iran a tributary state around 483–485. Shah of Persia Peroz fought three wars with Hephthalites. During the first war he was captured by Hephthalite army and later was released after Byzantine emperor paid a ransom for him. During the second war Peroz was captured again and was released after paying a huge contribution to the Hephthalite king. During the third war Peroz was killed. The Hephthalites were subjugated in 565 by a combination of Sassanid and Kök-Turk forces. Subsequently, present Tajikistan was ruled by Göktürks and Sassanids, however when the Sassanid Empire fell the Turks kept control of Tajikistan but they later lost it to the Chinese people, however, they later managed to take control of Tajikistan once again, only to lose it to the Arabs in 710.