Paul von Lettow Vorbeck
Paul Emil von LettowVorbeck was a general in the Imperial German Army and the commander of its forces in the German East Africa campaign. For four years, with a force that never exceeded about 14,000 , he held in check a much larger force of 300,000 British, Belgian, and Portuguese troops. Essentially undefeated in the field, LettowVorbeck was the only German commander to successfully invade imperial British soil during the First World War. His exploits in the campaign have been described by Edwin Palmer Hoyt as the greatest single guerrilla operation in history, and the most successful.
Paul Emil von LettowVorbeck was born into the Pomeranian minor nobility, while his father was stationed as an army officer at Saarlouis in the Prussian Rhine Province. He was educated in boarding schools in Berlin and joined the corps of cadets at Potsdam and BerlinLichterfelde. In 1890, he was commissioned a Leutnant into the Imperial German Army.
Source: Wikipedia