The Battle of Camperdown (Dutch: Zeeslag bij Kamperduin) was fought on 11 October 1797 between the Royal Navy's North Sea Fleet under Admiral of the Blue Adam Duncan and a Batavian Navy fleet led by Vice-admiral Jan Willem de Winter. Duncan's fleet won a complete victory over de Winter's in what was the most significant engagement between British and Batavian forces during the French Revolutionary Wars, capturing eleven ships without losing any of their own.
In 1795, the Dutch Republic was overrun by France and reorganised into the Batavian Republic, a French sister republic. After several French Navy campaigns ended in disaster, the Batavian navy was ordered to move to Brest in 1797. This rendezvous never occurred, as the French and their allies failed to capitalise on the Spithead and Nore mutinies that paralysed the British Channel and North Sea fleets in the spring of 1797. By September, the Batavian navy was blockaded in the Texel by the North Sea Fleet under Duncan, though the British were forced to return to Yarmouth for supplies in October. De Winter used the opportunity to lead the Batavian fleet into the North Sea; when they returned to the Dutch coast on 11 October, a waiting Duncan intercepted them off Camperduin.
Attacking the Batavian line of battle in two groups, Duncan's ships broke through its rear and van before engaging with de Winter's frigates. The battle split into a leeward melee, where superior British forces overwhelmed the Batavian rear, and a windward melee, where a more even exchange centred on battling flagships. As the Batavians attempted to reach shallower waters and escape Duncan's attack, the British leeward ships joined the windward melee and forced de Winter's flagship Vrijheid and ten other ships to strike their colours.
The loss of Vrijheid prompted the remaining Batavian ships to disperse and retreat, and Duncan ordered his fleet to sail back to Yarmouth with their prizes. Struck by gales en route, two prizes were wrecked and another had to be recaptured before Duncan's fleet reached England. Casualties in both fleets were heavy, and the Batavian Navy was broken as an independent fighting force, losing eleven ships and more than 1,100 men.
In the winter of 1794–1795, forces of the French Republic overran the neighbouring Dutch Republic during the French Revolutionary Wars. The French then reorganised the country as a client state named the Batavian Republic, and it joined France against the allies in the War of the First Coalition. One of the most important Dutch assets of which the French gained control was the Dutch States Navy. The Dutch fleet provided a substantial reinforcement to the French forces in northern European waters, which were principally based at Brest on the Atlantic Ocean and whose main opponent was the Royal Navy's Channel Fleet. The location of the main anchorage of the Dutch fleet in the waters off the Texel prompted a reorganisation of the distribution of British warships in Northern European waters, with a new focus on the importance of the North Sea. With the Navy suffering severe shortages in men and equipment and with other theatres of war deemed more important, small, old and poorly maintained ships were activated from reserve and based in harbours in East Anglia, principally the port of Yarmouth, under the command of Admiral of the Blue Adam Duncan. The 65-year-old Duncan was a veteran of the wars of the War of the Austrian Succession (1740–1748), the Seven Years' War (1756–1763) and the American Revolutionary War (1775–1783) and had fought at numerous engagements with distinction and success. Standing at 6 ft 4 in (1.93 m) he was also noted for his physical strength and size: a contemporary described him as "almost gigantic".
The French Navy had suffered a series of one-sided defeats in the opening years of the war, suffering heavy losses at the Glorious First of June in 1794 and during the Croisière du Grand Hiver the following January. In late 1796, after prompting from representatives of the United Irishmen (a society dedicated to ending British rule of the Kingdom of Ireland), the French Atlantic Fleet launched a large scale attempt to invade Ireland, known as the Expédition d'Irlande. This too ended in disaster, with twelve ships lost and thousands of men drowned in fierce winter gales. Their ambitions frustrated, the representatives of the United Irishmen, led by Wolfe Tone, turned to the new Batavian state for support and were promised assistance in the coming year by a united French and Dutch fleet. A plan was formulated to merge the French and Dutch fleets and attack Ireland together in the summer of 1797. Tone joined the staff of Vice-admiral Jan Willem de Winter on his flagship Vrijheid in the Texel and 13,500 Dutch troops were equipped in preparation for the operation, the fleet waiting only for the best moment to take advantage of easterly winds and sweep past the British blockade and down the English Channel.
For the Royal Navy, the early years of the war had been successful, but the commitment to a global conflict was creating a severe strain on available equipment, men and financial resources. The navy had expanded from 134 ships at the start of the conflict in 1793, to 633 by 1797, and personnel had increased from 45,000 men to 120,000, an achievement possible only as a result of the impressment service, which abducted criminals, beggars and unwilling conscripts for compulsory service at sea. Wages had not been increased since 1653, and were usually months late, rations were terrible, shore leave forbidden, and discipline harsh. Tensions in the fleet had been gradually rising since the start of the war, and in February 1797, anonymous sailors from the Channel Fleet at Spithead sent letters to their former commander, Lord Howe, soliciting his support in improving their conditions. The list was deliberately ignored on the instructions of First Lord of the Admiralty Lord Spencer, and, on 16 April, the sailors responded with the Spithead Mutiny: a largely peaceful strike action led by a delegation of seamen from each ship tasked with negotiating with the authorities and enforcing discipline. For a month the fleet remained at stalemate, until Lord Howe was able to negotiate a series of improvements in conditions that induced the strikers to return to regular service. The mutiny had achieved almost all of its aims; increasing pay, removing unpopular officers, and improving conditions for the men serving in the Channel Fleet and, ultimately, the whole navy.
While the upheaval continued at Spithead, Duncan had retained order in the North Sea Fleet at Yarmouth by the sheer force of his personality. When men from his flagship, HMS Venerable, clambered up into the rigging and roared three cheers in a prearranged signal for the revolt to begin on 1 May, Duncan initially threatened to run the ringleader through with his sword. Calmed by his subordinates, he instead assembled his officers and the Royal Marines aboard his ship and advanced on the men in the rigging, demanding to know what they were doing. So fierce was his tone that the men fell silent and hesitantly returned to their quarters except for five ringleaders, whom he admonished personally on his quarterdeck before issuing a general pardon and dismissing them to their duty. The following week, he assembled all of the men and demanded to know whether they would follow his orders: in response, the crew nominated a spokesman, who apologised for their actions, saying, "we humbly implore your honour's pardon with hearts full of gratitude and tears in our eyes for the offense we have given to the worthiest of commanders who has proved a father to us". A week later, when a similar outbreak of mutiny affected the fourth rate ship, HMS Adamant, under Captain William Hotham, Duncan again acted decisively, coming aboard Adamant as the crew rebelled and demanding to know if there was any man who disputed his authority. When a sailor stepped forward, Duncan seized him by his shirt and dangled him over the side of the ship with one arm crying, "My lads – look at this fellow – he who dares to deprive me of command of the fleet". The mutiny evaporated almost instantly.