The Battle of Beachy Head (Fr. Battle of Bévéziers) was a naval engagement fought on 10 July 1690 during the Nine Years' War. The battle was the greatest French tactical naval victory over their English and Dutch opponents during the war. The Dutch lost six ships of the line in total (sources vary), as well as three fireships, and their English allies also lost one ship of the line, whereas the French did not lose a single vessel. Although control of the English Channel temporarily fell into French hands, Admiral Tourville failed to pursue the Allied fleet with sufficient ardour, allowing it to escape to the river Thames.