it and accompanied by two Belgian ships, attacked and sank the German ship Hedwig von Wissmann. MV Liemba and Wami, an unarmed motorboat, were the only German ships left on the lake. In February 1916 the Wami was intercepted and run ashore by the crew and burned. Lettow-Vorbeck had the Königsberg gun removed and sent by rail to the main fighting front. Graf von Götzen was scuttled in mid-July after the Belgian Armed Forces made bombing attacks by floatplanes, loaned by the British, before Belgian colonial troops advancing on Kigoma could capture it; Graf von Götzen was refloated and used by the British. East African campaign, 1916–1918 Military operations, 1916 General Horace Smith-Dorrien was sent from England to take command of the operations in East Africa but he contracted pneumonia during the voyage and was replaced by General Smuts. Reinforcements and local recruitment had increased the British force to Africans British and Rhodesians and and African troops, from a ration strength of which included the Carrier Corps of African civilians. Belgian troops and a larger but ineffective group of Portuguese military units based in Mozambique were also available. During the previous 1915, Lettow-Vorbeck had increased the German force to The main attack was from the north from British East Africa, as troops from the Belgian Congo advanced from the west in two columns, over Lake Victoria on the British troop ships and and into the Rift Valley. Another contingent advanced over Lake Nyasa (now Lake Malawi) from the south-east. Lettow-Vorbeck evaded the British, whose troops suffered greatly from disease along the march. The 9th South African Infantry began the operation in February with and by October it was reduced to troops, mostly by disease. The Germans avoided battle and by September 1916, the German Central Railway from the coast at Dar es Salaam to Ujiji had been taken over by the British. As the German forces had been restricted to the southern part of German East Africa, Smuts began to replace South African, Rhodesian and Indian troops with the King's African Rifles and by 1917 more than half the British Army in East Africa was African. The King's African Rifles was enlarged and by November 1918 had Smuts left in January 1917 to join the Imperial War Cabinet at London. Belgian-Congolese campaign, 1916 The Belgian of formed three groups, each with yet expected to live off the land. The 1915