Battle of The Downs - Background

Background

The entry (in 1635) of France in the Thirty Years War had blocked off the overland "Spanish Road" to Flanders. To support the Spanish army of Flanders of Cardinal-Infante Ferdinand, the Spanish navy had to ferry supplies by sea via Dunkirk, the last Spanish-controlled port on the North Sea coast. A Spanish fleet, under admiral Lope de Hoces y Córdova, had managed to make the trip to Dunkirk in 1636 and again in 1637, without being spotted by Dutch squadrons. In 1638, the French invaded Spain, and laid siege to Fuentarrabia. Lope de Hoces was hurriedly dispatched to rescue the city, but his fleet was destroyed by the French navy under Henri de Sourdis while it lay at anchor near Getaria. As the remainder of the Spanish navy was engaged on missions in the Mediterranean and Brazil, there were not enough ships left for an attempt to Dunkirk that year.

In the Spring of 1639, the Count-Duke of Olivares ordered the construction and assembly of a new fleet at A Coruña for a new relief jaunt to Dunkirk. 29 warships were assembled in four squadrons, soon joined by an additional 22 warships (also in four squadrons) from the Spanish Mediterranean fleet. Twelve English transport ships also arrived, contracted to carry the Spanish army under the flag of English neutrality. Lope de Hoces was offered overall command, but he turned it down, as a result the command passed to Antonio de Oquendo, commander of the Mediterranean fleet. Oquendo was under instructions to assume a half-moon formation, to induce the Dutch into a boarding battle. The flagship was placed on the right wing (rather than the center), as that is where it was expected the Dutch firepower would come from. In a curious decision, ships of different squadrons were mixed through the formation, an attempt to ensure that the smaller ships would be supported by larger ones. The vanguard was to be composed of the seven-ship "Dunkirk squadron" commanded by Miguel de Horna, in light of their experience with the channel.

The Dutch States-General made their own preparations. From intelligence networks, the Dutch learned that the Spanish fleet might attempt to make for the anchorage known as The Downs, on the English coast, between Dover and Deal, and anchor in there under the protection of English neutrality, and ferry the army and supplies on smaller, fast boats across the English channel to Dunkirk. The States-General ordered a fleet of 23 warships and some fireships, under the overall command of Maarten Tromp, into the channel to prevent this eventuality, while the rest of the Dutch fleet was still being prepared. Tromp was under instructions to watch for and, if necessary, harass and delay the Spanish fleet, but was forbidden from engaging them in battle until the rest of the Dutch fleet, some fifty vessels under Johan Evertsen, had been launched and joined them. Setting out, Tromp divided his fleet into three squadrons – one squadron of fifteen ships, under rear admiral Joost Banckert, was dispatched to a position above the Downs, in case the Spanish fleet had circumvented the British Isles and was coming from that side, a second squadron of six ships under Witte de With was put inside the English channel, on patrol by the English coast, while Tromp himself took the remaining 12 ships to patrol the French side of the channel.