The siege of Dura Europos took place when the

Sasanians The Sasanian () or Sassanid Empire, officially known as the Empire of Iranians (, ) and also referred to by historians as the Neo-Persian Empire, was the last Iranian empire before the early Muslim conquests of the 7th-8th centuries AD. Named ...

under

Shapur I Shapur I (also spelled Shabuhr I; pal, 𐭱𐭧𐭯𐭥𐭧𐭥𐭩, Šābuhr ) was the second Sasanian King of Kings of Iran. The dating of his reign is disputed, but it is generally agreed that he ruled from 240 to 270, with his father Ardas ...

besieged the

Roman Roman or Romans most often refers to: *Rome, the capital city of Italy *Ancient Rome, Roman civilization from 8th century BC to 5th century AD *Roman people, the people of ancient Rome *'' Epistle to the Romans'', shortened to ''Romans'', a lette ...

city of

Dura-Europos Dura-Europos, ; la, Dūra Eurōpus, ( el, Δούρα Ευρωπός, Doúra Evropós, ) was a Hellenistic, Parthian, and Roman border city built on an escarpment above the southwestern bank of the Euphrates river. It is located near the vil ...

in 256 after capturing

Antioch Antioch on the Orontes (; grc-gre, Ἀντιόχεια ἡ ἐπὶ Ὀρόντου, ''Antiókheia hē epì Oróntou'', Learned ; also Syrian Antioch) grc-koi, Ἀντιόχεια ἡ ἐπὶ Ὀρόντου; or Ἀντιόχεια ἡ ἐπ� ...

. Dura-Europos was an important trading center in Roman Syria. It may or may not be the same as the "Doura" recorded in Shapur I's inscriptions. The town was in Sasanian hands for some time after its fall, and was later abandoned. Intact archaeological evidences at Dura provide details of the Roman presence there, and the dramatic course of the siege. The garrison was determined to resist the siege, and the Sasanians employed a variety of siege warfare techniques to defeat them. Archaeological evidences suggest that the garrison at Dura-Europos was mixed, composed of Cohors XX Palmyrenorum (which is known more than the others), vexillations from Legio IV Scythica Valeriana Galliena, III Cyrenaica, XVI Flavia Firma, and other cohorts, including Cohors II Paphlagonum Galliana Volusiana and possibly Cohors II Equestris. The relationship between these forces are uncertain. XX Palmyrenorum was certainly based in Dura-Europos, and may have been an "inferior" contingent of the garrison relative to the legionaries. The numbers of the legionaries are unknown.

Use of chemical weapons

The siege was notable for the early use of chemical weapons by the attacking Persian army. During the siege the attackers dug several underground shaft mines under the city walls. The Romans dug tunnels to reach the mines and fight the diggers underground. In one such tunnel, when the Romans broke through into the Sassanian tunnel the tunnelers ignited a mixture of sulfur and pitch, producing a cloud of sulfur dioxide, which killed twenty Roman soldiers, one of which was carrying a coin dated 256, allowing the dating of the siege. Archaeologists excavated the scene in the 1930s. In 2009 tests showed the presence of sulfur dioxide inside the tunnel. In 2020, a group of chemistry students in Foxborough, Massachusetts used chemical analysis of the samples in the tunnel compared with the composition of bitumen and deduced that methane was also likely a by-product of the attack.

Gallery

File:Doura Europos tunnel.jpg,

Tunnels A tunnel is an underground passageway, dug through surrounding soil, earth or rock, and enclosed except for the entrance and exit, commonly at each end. A Pipeline transport, pipeline is not a tunnel, though some recent tunnels have used ...

made by the Sasanians File:Doura Europos collapsed city wall.jpg, Ruins of the city walls File:DuraEuropos-WadiSouth.jpg, The southern wall. One of the Sasanian assaults was performed against this side of the walls File:Doura Europos Dux ripae palace 1.jpg, The citadel File:Doura Europos Dux Ripae palace 3.jpg, The citadel File:DuraEuropos-Praetorium.jpg, The ''praetorium'', the headquarters of the legionaries

References

253

3rd century in Iran 250s in the Roman Empire Dura-Europos Shapur I

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