Crassus’s expedition
Rome launches an offensive campaign in Mesopotamia without adequate intelligence or local support. Carrhae turns the legion’s superiority at close quarters into vulnerability against mobile missile fire.
Military history
The strategic problem
The Roman–Parthian Wars do not form a continuous campaign. They pit two powers seeking to control Armenia, Upper Mesopotamia and client kingdoms without easily maintaining deep occupation. Parthian mobility and Roman legions yield different advantages; the outcome often depends on season, allies and supply routes.
Roman recoveries and compromise
Antony and then Augustus seek to restore Roman prestige, regain the initiative in Armenia, and recover the lost standards. Diplomacy sometimes obtains what conquest cannot hold.
Rome’s last great gamble
Trajan pushes farther east, captures capitals and reaches the Persian Gulf, but revolts and the difficulty of securing communications make the conquest reversible.
Explore
1 published battles, in chronological order
Military history
Sources
Indirect ancient sourcePlutarque, Vie de Crassus
Account of Carrhae, Crassus’s decisions, and the Roman tradition concerning the defeat.
Indirect ancient sourceTacite, Annales, livres II et VI
Roman–Parthian relations, Armenia, and the diplomacy surrounding the standards.
Specialist studyMichael P. Speidel, The Roman Army in the East
The eastern frontier, mobility, armies, and the constraints on Roman campaigns.