Dunkirk was besieged promptly and in great force, and when Don Juan of Austria and Condé appeared with the relieving army from Fumes, Turenne advanced boldly to meet them. The Battle of the Dunes, fought on 14 June 1658, was the first real trial of strength since the battle of the Faubourg St Antoine. Successes on one wing were compromised by failure on the other, but in the end Condé drew off with heavy losses, the success of his own cavalry charges having entirely failed to make good the defeat of the Spanish right wing amongst the Dunes.