In the East, the Parthians dealt Rome one of its greatest military disasters at the Battle of Carrhae in 53 BCE. Their superior cavalry and mounted archers annihilated the legions of Marcus Licinius Crassus , stalling Roman expansion into Persia for centuries. Internal Resistance: The Struggle for Liberty
Not all who fought Rome came from without; many of the fiercest struggles originated within the empire's borders. Against Rome
The most famous external challenges to Rome often came from powerful neighboring states that viewed the growing Republic as an existential threat. In the East, the Parthians dealt Rome one