 Such a force was twice the size of Marcus Licinius Crassus's army from his failed Parthian invasion of 53 BC and three times those of Lucius Licinius Lucullus and Lucius Cornelius Sulla during the Mithridatic Wars.The size of his army indicated Antony's intention to conquer Parthia, or at least receive its submission by capturing the Parthian capital of Ecbatana.Antony's rear was protected by Rome's client kingdoms in Anatolia, Syria, and Judea, while the client kingdoms of Cappadocia, Pontus, and Commagene would provide supplies along the march.