The Second Anglo-Dutch War was a conflict between the Commonwealth of England and Dutch Republic. In this war England tried to end Dutch domination of world trade and though there were some Dutch victories, the Commonwealth was victorious. Though this resentment led to Dutch help of the Jacobites in the Second English Civil War and a renewed conflict afterwards.
The First Anglo-Dutch War concluded with an English victory in the Battle of Scheveningen in August 1653, though a peace treaty wasn't signed for 8 months after the conflict. Also in 1658 the Commonwealth sided with the Swedish Empire in the Dano-Swedish War, while the Dutch sided with Denmark-Norway, and so this war has been described simply as another theatre of that war.
Treaty of Windsor
After having defeated the Dutch yet again (only just) the Treaty of Windsor was drawn up. This led to the Banda Islands to be ceded to the Commonwealth and also for the occupied New Netherlands to be ceded to the Commonwealth, though in return Charles Fleetwood allowed for Suriname to be ceded to the Dutch.
Another smaller condition in this treaty was that 'New Sweden' be given back to the Swedish government after New Netherlands were ceded to the Commonwealth.