Admiral Sir John Harman was an English officer of the Royal Navy, who served first under the Commonwealth, then Charles II following the 1660 Stuart Restoration.
Sir John Harman, c. 1668
Action between ships in the First Dutch War by Abraham Willaerts
Battle of Lowestoft, 3 June 1665, showing HMS Royal Charles and the Eendracht by Hendrik van Minderhout
St. James Day Battle
The Second Anglo-Dutch War, or Second Dutch War, began on 4 March 1665, and concluded with the signing of the Treaty of Breda on 31 July 1667. One in a series of naval conflicts between England and the Dutch Republic, its causes were a combination of political differences and commercial disputes.
The Four Days' Battle, 1–4 June 1666, by Abraham Storck
Ships in Amsterdam harbour, c. 1690; in the second half of the 17th century, Dutch merchants dominated European trade
HMS Sovereign of the Seas, with its architect Peter Pett; built in 1634, it carried over 100 guns, while the largest Dutch ships had a complement of 60 to 70
The Four Days' Battle as depicted by Abraham Storck