Treaty of Westminster System of 1654

Timeline

1. 1652–1653North Sea · North SeaIn 1651 Cromwell's government issued the Navigation Acts, requiring goods imported into England to be carried on English ships or ships of the country of origin, directly undermining the Dutch carrying trade. The First Anglo-Dutch War broke out in 1652, with fierce naval battles in the North Sea, the English Channel, and the Mediterranean. Though the Dutch won repeated tactical victories, mounting pressure from the naval blockade forced them to seek peace talks by late 1653.
2. 1654Palace of Westminster · LondonThe formal text contained 28 public articles, whose core provisions were: the Dutch recognized the validity of the 1651 Navigation Acts; the Dutch compensated the English East India Company for losses in the Amboyna massacre (1623); and both sides mutually returned ships and goods captured during the war. The secret additional clause, the Act of Exclusion, was passed by the Dutch States alone, promising not to appoint the young William III (Prince of Orange) as stadtholder, to allay Cromwell's fears of a Stuart restoration.
3. 1654–1660English Channel and North Sea trading zone · Northwest EuropeAfter the treaty took effect, the Dutch substantive concession on the Navigation Acts allowed English merchant shipping to steadily expand its share on Baltic and East Indies routes. The Act of Exclusion provoked a strong backlash in the Netherlands, accelerating the political rift between Orangists and Republicans. After Cromwell's death in 1658 and the Stuart Restoration in 1660, Charles II drew closer to the Dutch, the Act of Exclusion lapsed, and the entire Treaty of Westminster system came to a diplomatic end; however, the Navigation Acts framework continued into the 1660s and directly triggered the Second Anglo-Dutch War.