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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
- 30 April - The paper rix dollars is issued for the first time in the Cape
