I was quite surprised that knights have their origins, not in western europe, but 2nd century Iran.
From the article:
In the second century A.D. the nomadic tribes of the Central Asian steppes would pass through the Hindu Kush and raid the cities of what is now Iran. Their tactics consisted of a mass charge of mounted warriors firing arrows as they attacked. This onslaught overwhelmed their opponents. They were stopped only when the Sassanian rulers of Iran put armor on their warriors and their horses. These heavily armored cataphracts withstood the onslaught of arrows and then counterattacked with lances. This system of defense was effective but very expensive. There were not only the high costs of the armor for man and horse but the horses themselves were particularly expensive because they were a special breed. In addition the warriors required extensive training.
The Sassanian rulers of Iran financed these cataphracts by assigning them each an area which was responsible for providing their armor and horse and supporting them while they were trained. This arrangement led to the feudal social structure with the military elite at the top and the peasant-serfs at the bottom. Sassanian literature such as Karnamag-i Artaxshir-i Papakan (Deeds of Ardashir) and the Shahnameh (The Book of Kings) bear testimony to their pursuit of chivalry.
Later the system of heavily armored cataphracts spread to the steppes north of the Black Sea and on into Europe. The Sarmatians, an Iranian-language-speaking people, displaced the Scythians in what is now south Russia and the Ukraine.
The realm of the Sarmatians extended from the Han Empire in the east to the Roman Empire in the west. From the Chinese, among other things, the Sarmatians adopted the dragon motif.
In the third century A.D.[citation needed] the Sarmatians fought the Romans near the mouth of the Danube River on the Black Sea. The Sarmatians lost the battle but they so impressed the Romans with their fighting prowess that the terms of the peace called for six thousand Sarmatian warriors and their horses to join the Roman army. The Emperor Marcus Aurelius sent 5500 of these Sarmatians to the northern border of the Roman Empire in Britain to guard it against attacks by the Celts.
Physical artifacts of this Sarmatian force have been found, including retirement villages. There are other things which may be cultural artifacts of the Sarmatian presence. There is a good chance that Celtic dragon image came from Sarmatian sources. The really intriguing possibility is a link between the Arthurian legends and the Sarmatians. In the religion of the Sarmatian the altar was a sword embedded in a stone. Arthur's father was Uther Pendragon. Pendragon means "dragon's head" and refers to the dragon-head symbol on a shield. The evidence suggests that the Sarmatians with their armor created a military caste that survived several centuries and provided the leadership in the early feudal era.
