 In August 1665 the English fleet was again challenged, though no large battles resulted.In 1666, the English became anxious to destroy the Dutch navy completely before it could grow too strong and were desperate to end the activity of Dutch raiders which threatened the collapse of English maritime trade.After Lowestoft, English warships and privateers blockading the three main entry and exit points where Dutch merchant shipping concentrated, namely Texel, the Maas river and off Zeeland temporarily paralysed Dutch overseas trade and weakened Dutch business confidence.