The Battle of the Dogger Bank took place on 5 August 1781 during the Fourth Anglo-Dutch War, part of the American War of Independence, in the North Sea. It was a bloody encounter between a British squadron under Vice Admiral Sir Hyde Parker, 5th Baronet and a Dutch squadron under Vice Admiral Johan Zoutman, both of which were escorting convoys.
The Dutch were extremely important to the success of the rebellion. Without Dutch trading in the early months of the war, the American forces would have been even more desperately short of military supplies than they were, with potentially disastrous consequences.
The Dutch were also the first to recognize America, albeit informally. The Dutch governor of St. Eustasis ordered a cannon salute for the first ship to fly the American flag.
He was later recalled to the Netherlands to answer for his actions, but it was never formally repudiated.
Barbara Tuchman’s wonderful The First Salute is an excellent resource to learn more.