The Fourth Anglo-Dutch War (1780–1784) was a conflict between the Kingdom of Great Britain and the Dutch Republic. The war, tangentially related to the American Revolutionary War, broke out over British and Dutch disagreements on the legality and conduct of Dutch trade with Britain's enemies in that war.
Although the Dutch Republic did not enter into a formal alliance with the United States and their allies, U.S. ambassador (and future President) John Adams managed to establish diplomatic relations with the Dutch Republic, making it the second European country to diplomatically recognize the Continental Congress in April 1782. In October 1782, a treaty of amity and commerce was concluded as well.
Most of the war consisted of a series of largely successful British operations against Dutch colonial economic interests, although British and Dutch naval forces also met once off the Dutch coast. The war ended disastrously for the Dutch and exposed the weakness of the political and economic foundations of the Republic.