In 53 BCE the Parthians crushed the Romans in a battle, capturing thirty-four thousand legionnaires and killing Crassus who, along with Caesar and Pompey, had been coruler of Rome. Thirty years later, the Parthians dealt Mark Antony a stinging defeat and established the Euphrates River as the border between the two empires. The Parthians were still expanding east when Christ was born. The spread of Christianity went little noticed by the Parthians, who favored Zoroastrianism in a lukewarm sort of way.
