Jan Wyck was one of a small group of Dutch painters who came to England after the Restoration; he accompanied his father, Thomas, and remained in England until his death. This portrait of his fellow-countryman, William III, is known through several versions, one signed and dated 1692 (Blenheim Castle), giving an approximate date for this work. The episode depicted here perhaps refers to one of the King’s campaigns in the Low Countries; his second-in-command approaching to the right cannot be identified but may be Charles, second Duke of Schomberg (1645-93).