Study of the Civil Defense Organization in the Sassanid era (based on comparative study of historical sources and archaeological evidence)

The 1st Ardeshir(224_240 m) as the progenitor of Sasani revived ancient Persian conventions. Among social classes of Sasanian the warriors formed the second class. They had to protect the empire and subordinates. At first,Iran army was responsible for the guidance and leadership of soldiers,but during the ruling of Ghobad and his son the first Khosro, the establishment of the army changed and it was delivered to four armies in four corners of Sasani sovereignty.  The present research aims to evaluate the extent of consistency between historical data and archeological findings about Sasani army and the question here is that which archeological evidence have been found about Sasani army in Iran?The research method is historical _ archeological based on library studies and archeological evidence. The research results showed that in this period the constructed ddefenive structures are constrained to three groups: castles, defensive walls and trenches. Sasani kings started to construct defense structures such as defense walls of Darband,Gourgan,Temishe, Kalat, Goori…castles like Siraf,Abonasr, Nakhlak, Shirkooh… in sensitive geographical areas to protect paths and to prevent alien attacks to the empire