Hermann von Wissmann was a German steamer on Lake Nyasa named after the German explorer Hermann von Wissmann who had raised funds for the vessel to be built in 1890 as an anti-slavery gunboat. The attack of the British lake-steamer Gwendolen on Hermann von Wissmann while it was on a slipway at Sphinxhafen, in English Liuli, was the first naval action of World War I. The British disabled the vessel briefly in 1914, then in 1915 completely put the vessel out of action. From 1916-1920 the boat served as HMS King George, then from 1920 as the cargo steamer Mlonda until it was scrapped in 1950.