Battle of the Downs

Spain was fighting the Dutch Republic in the Eighty Years' War and needed to carry soldiers and supplies to its army in Flanders. The overland route had become dangerous, so Admiral Antonio de Oquendo sailed a large convoy north through the Channel in 1639. Tromp intercepted it with a much smaller Dutch force in September. After a running fight, Oquendo took shelter in the Downs, the protected water between the Goodwin Sands and the Kent coast, expecting neutral England to shield him. The Dutch blockaded the anchorage and called in more ships. King Charles I wanted both sides to respect English waters, but his small fleet could not make them do so.

Lists and reports disagree, but the Spanish force began with about fifty warships as well as troop and supply vessels carrying many thousands of soldiers. Some transports slipped through to Flanders before the final battle. Tromp began the September fighting with only a small group, then Dutch reinforcements gave him a force large enough to seal both ways out of the Downs. Oquendo's remaining ships lay at anchor close to the Kent shore and the dangerous Goodwin Sands. English ships under Sir John Pennington stood nearby but had orders that did not match the force needed to stop an attack. The Dutch divided their ships into groups, held off any English move and prepared fire ships to break the crowded Spanish anchorage.

The Dutch attacked early in thick mist on 21 October by the modern calendar; old English accounts often call it 11 October because the countries then used different calendars. Tromp's groups closed on the anchored fleet while fire ships drifted into it. Spanish ships tried to cut their cables and escape, but some were burned, some captured and many deliberately ran onto the Kent shore to avoid fire or Dutch boarding. Oquendo and a small group fought their way out towards Dunkirk. English guns and ships could not separate the fleets. People watched from Deal and Walmer, bodies and wreckage washed ashore, and local people stripped stranded ships despite later court cases over who owned the goods.

The Dutch destroyed, captured or drove ashore most of the Spanish force still in the Downs. A British Museum account says five ships were sunk and twenty-three driven ashore, with only ten escaping, but totals vary because writers counted the convoy at different stages. The number killed is also disputed and runs into the thousands in some reports; there is no single safe figure. Tromp had nevertheless won a complete naval victory and Spain could no longer use this fleet to challenge Dutch control of the sea route. The English had claimed command of their coastal waters yet could neither protect the Spanish anchorage nor stop the Dutch attack.

The victory confirmed the Dutch Republic as the leading sea power in these waters and badly damaged Spain's ability to reinforce Flanders by open convoy. It also became a public humiliation for Charles I. He had raised ship money partly in the name of protecting the coast, but the castles at Dover, Deal and Walmer watched a foreign fleet win a huge battle almost within gunshot. Anger over that tax and doubts about royal government fed the crisis that led towards civil war. For Kent the battle was not a distant mark at sea: wounded men, bodies, grounded ships, salvage and court claims came ashore. The wide map point is therefore an anchorage and battle area, not the exact place of one ship.