Ended the First Anglo-Dutch War and introduced early modern international arbitration as a method of dispute resolution.
Key Facts
- Date signed
- 15 April 1654 (New Style)
- War ended
- First Anglo-Dutch War (1652–1654)
- Signatories
- English Commonwealth and States General of the United Netherlands
- Notable clause
- Secret Act of Seclusion barring House of Orange from stadtholdership in Holland
- Historical first
- One of the earliest treaties using international arbitration
Location
Cause → Event → Consequence
The First Anglo-Dutch War, fought from 1652 to 1654 over trade rivalry and English navigation laws, left both England and the Dutch Republic seeking a settlement. Oliver Cromwell's Commonwealth government pressed for terms that would also address dynastic concerns regarding the House of Orange and its ties to the Stuart monarchy.
The Treaty of Westminster was signed on 15 April 1654 between Oliver Cromwell, Lord Protector of the English Commonwealth, and the States General of the United Netherlands. It formally ended the First Anglo-Dutch War and included a secret clause compelling the States of Holland to pass the Act of Seclusion, barring members of the House of Orange from the stadtholdership.
The treaty concluded the war and helped stabilize Anglo-Dutch commercial relations. The secret Act of Seclusion clause shaped Dutch domestic politics throughout the First Stadtholderless Period (1650–1672), weakening the Orange faction. The treaty's use of arbitration mechanisms also contributed to the development of international dispute resolution practices in early modern diplomacy.
Political Outcome
Peace concluded ending the First Anglo-Dutch War; Dutch Republic bound by secret clause to exclude House of Orange from Holland's stadtholdership.
England and the Dutch Republic at war; House of Orange holding political influence in Holland
Peace restored; House of Orange excluded from Holland's stadtholdership under the Act of Seclusion