The following lists events that happened during the 1780s in South Africa. Events 1780 The Fish River is made the eastern boundary of the Cape Colony July - The Sultan of Mysore, India declares war on the British October - Joachim van Plettenberg, Governor of the Dutch Cape Colony appoints Adriaan van Jaarsveld, to be field commandant over the eastern front. 16 December - The Netherlands joins the League of Armed Neutrality that is formed by Catherine the Great of Russia to protest British interference with the shipping of neutral nations during the war. Russia, Sweden, Prussia, Denmark, Austria, Portugal and Italy all join 20 December - Britain declares war on the Netherlands French troops arrive at the Cape Colony to guard it against the English 1781 3 February - Scottish forces captured St Eustatius and neutralises all other Dutch outlets in the West Indies and in Surinam. French and German forces later recaptured the island for the Spanish. July - Field Commandant Adriaan van Jaarsveld declares the Zuurveld, a district between the Sundays and the Great Fish Rivers clear of the Xhosa tribes hereby ending the First Cape Frontier War 5 August - The Dutch fleet clash with the British Fleet at Dogger Bank in the English Channel 19 October - American and French soldiers and French naval forces force the surrender of Lord Cornwallis at Yorktown, Virginia, ending the American War of Independence 1782 April - François Le Vaillant, French explorer, collector and ornithologist, arrives in the Cape Colony and travels until 1785 30 April - The paper rix dollars is issued for the first time in the Cape Grosvenor, wreck, Pondoland coast of South Africa British forces capture the French outpost of Cuddalore in the Indian Ocean, later recaptured The Dutch port of Trincomalee on Ceylon is captured by the British, later recaptured back by the French 1783 3 September - The Treaty of Paris is signed ending the war. The Dutch have lost the most from the war The French troops departed the Cape 1785 14 February - Cornelis Jacob van de Graaff is appointed Governor of the Cape 3 May - The Dutch East India Company ship, the Brederode, carrying a cargo of porcelain, tin and spices, runs aground near Cape Agulhas 1786 The Dutch East India Company established a magistracy at Graaff Reinet 1787 The Dutch East India Company passed a law subjecting the