At this time Louis XIV had pledged himself to give aid to the Netherlands in case of attack by a third Power. But when the Dutch and his own ministers called on him to make good his promise he offered more promises and no fulfillment. The rumor of an approaching French squadron which was to make junction with de Ruyter, who had now been placed in command of the Dutch fleet, caused the English government to make the grave mistake of detaching Prince Rupert with 20 ships to look for the mythical French force. This division left Monk, who was again in command of the fleet, with only 57 ships. Hearing that de Ruyter was anchored on the Flanders coast, Monk went out to find him. De Ruyter left his anchorage to meet the English, and on June 1, 1666, the two forces met in mid-Channel, between Dunkirk and the Downs. As the Dutch force heavily outnumbered him--nearly two to one--Monk might have been expected to avoid fighting, but he acted in the spirit of Blake. Having the windward position he decided that he could strike the advanced division under Tromp and maul it severely before the rest of the Dutch could succor it. Accordingly he boldly headed for the enemy's van. When Monk attacked he had only about 35 ships in hand, for the rest were straggling behind too far to help. Thus began the famous "Four Days' Battle," characterized by Mahan as "the most remarkable, in some of its aspects that has ever been fought upon the ocean."[1] [Footnote 1: THE INFLUENCE OF SEA POWER UPON HISTORY, p. 125.] The fighting was close and furious and in its unparalleled duration numbers were bound to tell. On the third day Monk retreated to the Thames, but on being joined by Rupert's squadron immediately sallied forth to do battle again. On this day, June 4, the Dutch succeeded in cutting through his formation and putting him between two fires. Indeed Monk escaped destruction only by breaking through his ring of enemies and finding refuge in the Thames. The Dutch had won a great victory, for the English had lost some twenty ships and 5000 in killed and wounded. But Monk was right in feeling a sense of pride in the fight that he had made against great odds. The losses that he had inflicted were out of all proportion to the relative strength of the two forces. Unfortunately the new spirit that was coming into the navy of the Restoration was evidenced by the fact that a number of English captains, finding the action too hot for them, deserted their commander in chief. On the Dutch side de Ruyter's handling of his fleet was complicated by the conduct of Cornelius Tromp. This officer believed that he, not de Ruyter, should have been made commander of the Dutch fleet and in this action as in the next, acted with no regard for his chief's orders.