What about the bureaucratic/military system of the Sassanid Empire

>>1525755
kek, diaspora is silent because besides muh hormazd muh shahanshah muhfucka they don't know jackshit about Persian history

>>1525755
Feudalism

European Feudalism is based off of the Persian system.

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>>1525755
Sassanids were far more autocratic, centralized, and built on various different strata of military and administrative systems to enhance its stability as a major power; they also used the satrap system and the various checks and balances of provincial governors, secretaries, agents answerable only to the King, etc...

As fr their military you had freemen of direct Aryan/Iranian descent who were retained as elite archers and the backbone of the cavlary corps; nobles usually had their own retainers much like a feudal lord or aristocrat in Europe had knights who made up the more higher status and heavier cataphract forces. Other various allied nations or vassal states complimented their military with lighter armed horsemen as scouts, horse archers, and foot soldiers; Dalyamite and Sogdians producing the finest heavy armed infantry for the Sassanids.

>How did the Sassanids manage to overthrow the Parthians?
By Parthians you mean the Arsacid dynasty? They were already declining from various Roman invasions, internal revolts and uprisings, as well as several civil wars. Ardashir, the Sassanid dynasty's founder and son of Papk was a devout and extremely powerful Kavi (local kinglet) himself who came from a highly prestigious family who were already fomenting rebellions against the Arsacids about 40 years earlier since his father's time. After Atrabanus had successfully revolted and compelled his older brother to surrender after a war for the throne, Ardashir launched his rebellion openly, taking several vassal states, having several of Atrabanus supporters switch sides and eventually killed him in their final battle which had all the Great Houses of Parthia swear allegiance.

Or tl ; dr Parthian Empire exhausted itself with over two hundred years of warfare with Rome, multiple civil wars, series of increasingly weak rulers, and anti-Greek/anti-Roman nationalism in Iranian peoples flaring up which the Sassanid Persians took advantage of to get power.

>>1525755
There was only the Achaemenid Empire as the previous "Persian" empire unless you want to count the Median empire, which makes sense somewhat since the Achaemenids where just the maternal branch of the same family and dynasty that founded the Median family from Cyrus' mother. Parthian/Parni/Arsacid Empire is Iranian and Persianized but they are not Persians themselves.

Also main thing that set them apart with the Sassanids is that they were heavily calvary based and not infantry based though it seemed like the late Achaemenids seemed to be heading toward horsemen themselves and starting to move away from light and medium infantry focus.

>>1525755
Chosen by allah.

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>>1526072

>>1526039
This pretty much straight up answers your questions OP. I wonder how much of an influence Rome had on Sassanid centralisation, and it interests me how Diocletian appears to have taken a lot from them in regards to his own reforms of ceremony and imperial power dynamics.