the Germans to the south. From 1917, Lettow-Vorbeck fought a costly battle at Mahiwa, with casualties and losses in the Nigerian brigade. After the news of the battle reached Germany, Lettow-Vorbeck was promoted to Generalmajor. German offensives, 1917–18 Portuguese Mozambique British units forced the Schutztruppe south and on 23 November, Lettow-Vorbeck crossed into Mozambique to plunder supplies from Portuguese garrisons. Lettow-Vorbeck divided his force into three groups on the march; a detachment of under Hauptmann Theodor Tafel ran out of food and ammunition and was forced to surrender before reaching Mozambique. Lettow and Tafel were unaware they were only one day's march apart. The Germans fought the Battle of Ngomano in which the Portuguese garrison was routed, then marched through Mozambique in caravans of troops, carriers, wives and children for nine months but were unable to gain much strength. In Mozambique, the Schutztruppe won a number of important victories which allowed it to remain active but also came close to destruction during the Battle of Lioma and Battle of Pere Hills. Northern Rhodesia The Germans returned to German East Africa and crossed into Rhodesia in August 1918. from early October, news that could be gleaned went from bad to worse. It was rumoured that Hindenburg was dead and that the Allies were about to impose an armistice on Germany and morale amongst the Germans plunged and desertions by carriers increased. On 9 November the German force reached Kasama whose district officer, Hector Croad, had evacuated the town on hearing of the German approach and stripped it of ammunition. The Germans pursued Croad who had lodged the supplies in a rubber factory on the opposite side of the Chambezi River. The Germans began probing attacks on the factory on 12 November, as Lettow-Vorbeck and his column arrived. The Germans captured the factory after a four-hour engagement and the British melted away to the west. A British dispatch rider fell into German hands who told the Germans of the Armistice of 11 November 1918. The information arrived in time to forestall another attack on the rubber factory and Croad met Lettow-Vorbeck, who found it difficult to believe that Germany had lost the war and impossible to accept that the Kaiser had fled to Holland and that Germany had become a republic. German surrender The terms of the armistice were a great shock to the Germans but at on 25 November 1918, Lettow-Vorbeck