 The exact route taken by Odaenathus from Palmyra to Ctesiphon remains uncertain ; it is probably similar to the route emperor Julian took in 363 during his campaign against Persia . Using this route , Odaenathus would have crossed the Euphrates at Zeugma then moved east to Edessa followed by Carrhae then Nisibis ; here , he would have descended south along the Khabur River to the Euphrates valley and marched alongside the river 's left bank to Nehardea . After taking the city , he penetrated the Sassanian province of Asōristān and marched along the royal canal Naarmalcha towards the Tigris where the Persian capital stood . 
 The exact route taken by Odaenathus from Palmyra to Ctesiphon <a href='uninflect' title='1'><mark>remains</mark></a> uncertain ; it is probably similar to the route emperor Julian took in 363 during his campaign against Persia . Using this route , Odaenathus would <a href='been_done' title='2'><mark>have</mark></a> crossed the Euphrates at Zeugma then<a href='been_done' title='3'><mark></mark></a> moved east to Edessa followed by Carrhae then Nisibis ; here , he would <a href='been_done' title='4'><mark>have</mark></a> descended south along the Khabur River to the Euphrates valley and marched alongside the river <a href='null_genetive' title='5'><mark>'s</mark></a>left bank to Nehardea . After taking the city , he penetrated the Sassanian province of Asōristān and marched along the royal canal Naarmalcha towards the Tigris where the Persian capital stood . 
Da exact route taken by Odaenathus from Palmyra to Ctesiphon remain uncertain ; it is probably similar to the route emperor Julian took in 363 during his campaign against Persia . Using this route , Odaenathus would done crossed tdaEuphrates at Zeugma then been moved east to Edessa followed by Carrhae then Nisibis ; here , he would done descended south along thdahabur River to the Euphrates valley and marched alongside the river  left bank to Nehardea . After takin thedaty , he penetrated the dasanian province of Asōristān and marched along the rdal canal Naarmalcha towards the Tigris where the Pedaan capital stood .