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.
Rais Ali Delvari
In World War I, Iran was neutral . In reality, Persian forces were affected by the rivalry between the Allied Powers and the Central Powers and took sides based on the conditions. Western interest in Persia was based on its significant oil reserve and its strategic situation between Afghanistan and the warring Ottoman, Russian, and British Empires. Persia was divided into northern and southern spheres of influence under the Anglo-Russian Treaty of 1907. The treaty defined their respective spheres of influence in Iran and Afghanistan and provided a counterweight to German influence. This treaty was widely viewed by Iranians as having made the nation into nothing more than a British and Russian protectorate, so during the World War I, many local rebellions occurred in Iran against the British and Russian forces participating in war against Central powers of World War I. In Northern Iran, Jangal movement of Gilan, was the main operating local force against the British and Russians forces, and in Southern Iran, Qashqai, Tangistani and Laristani tribes were the main resisting power against the British empire. In both Southern and Northern movements, Persian Central Government Gendarmerie supported the rebels (See Persian Campaign ).