250BC The provinces of Parthia and Greco-Bactria split from the Seleucid Empire.
220BC The Parthians take over several eastern provines of the Seleucid Empire
209BC The King of Selucia, Antiochus III, defeats the Parthians and ends the Greco-Bactrian expansion.
190BC Romans defeat Antiochus III at Magnesia, Lydia
170-68BC Mithridates I leads the Parthians to conquer Elymais, Persia, Mewdia and Bactria
141BC The provinces of Parthia and Greco-Bactria rebel against the Seleucid Persian Empire.
141BC Parthians sieze control of Mesopotamia
135BC Parthina lose conrtol of eastern provinces of Iran due to raids of Iranian Saka nomads.
95BCParthians regain control of Iran and retain some of the nomads as subjects.
64BC Rome takes control of western Asian coast. This land grab was from Pontus in the North down to Egypt in the South. The kingdoms with in this area are made vasals. Those in close proximity are made client states.
53BC In a foolish bid for presitge, Marcus Licinius Crassus leads a Roman army to be almost totally destroyed by the Parthians at Carrhae.
20AD Augustus Caesar reclaims Armenia and Transcaucasia. The Parthinas return the Legionary standards lost at Carrhae
53AD Rome and Parthia enter into a 10 year war over control of Armenia.
63AD One legion from Spain and one from Dalmatia are restationed on the Parthian front
115AD Rome ivades Parthia
118-119AD Rome makes advances in Mesopotamia
226AD The Parthian crown is overthrown by the Sassanid Persians
1. Rome's Enemies (3): Parthians and Sassanid Persians by Peter Wilcox