In the short space of six weeks [ " actually about 9 weeks, May 7, 1592 July 7, 1592 " ] he had achieved a series of successes unsurpassed in the whole annals of maritime war, destroying the enemy's battle fleets, cutting his lines of communication, sweeping up his convoys, imperilling the situation of his victorious armies in the field, and bringing his ambitious schemes to utter ruin.