The Battle of Lowestoft took place on during the Second Anglo-Dutch War. A fleet of more than a hundred ships of the United Provinces commanded by Lieutenant-Admiral Jacob van Wassenaer, Lord Obdam attacked an English fleet of equal size commanded by James, Duke of York forty miles east of the port of Lowestoft in Suffolk. Although it was a substantial English victory, the escape of the bulk of the Dutch fleet deprived England of the chance of ending the war quickly with a single decisive victory. As a result, the Dutch were able to make good their losses by building new and better-armed ships and improving their organisation and discipline. Their Dutch fleets would not be so badly organised or ill-disciplined in the remaining battles of this war and, in Obdam's replacement, Michiel de Ruyter, the Dutch had gained a superb tactician and leader for the remainder of the war. Background The Second Anglo-Dutch War resulted from long-standing commercial tensions between England and the Netherlands. Despite diplomatic negotiations to avoid the outbreak of war, each country refused to compromise, and hostile acts by each side continued. The English ambassador in France reported that Louis XIV of France would probably evade his treaty obligations and refuse to be drawn into war with England if the Dutch could be provoked into declaring war: following English attacks on Dutch convoys, one off Cadiz and the other in the English Channel, the Dutch Republic did declare war on England on 4 March 1665. At the start of the war, both sides considered an early decisive battle was desirable, as English government finances could not sustain a long war, and as an English blockade of Dutch ports and attacks on their merchant and fishing fleets would soon bring about the ruin of the Dutch economy. After an early English blockade which took place in April and May was broken off through its ships' lack of supplies, the Dutch were desperate to prevent a second blockade. The Grand Pensionary and leading Dutch politician, Johan de Witt and other members of the States-General, formed a commission to supervise Obdam, which gave him detailed instructions comprising 26 articles, ordering him to attack the English aggressively when and where he could do them most damage. However, these instructions gave Obdam little guidance on how he should do so. Although the Dutch had ordered the construction of many new warships,