Bolstered by the fresh troops, the Spartans and their Macedonian allies prepared themselves for Pyrrhus' next assault against the trench. The presence of more adversaries intensified Pyrrhus' determination to capture the city and he ordered another attack on the trenches. He was unable to accomplish anything and suffered further losses. The failure of this attack convinced Pyrrhus about the futility of persevering with the siege and he decided to lift it and withdraw.
