The Regiment took part in operations in German East Africa from the beginning of the campaign there in November 1914. There, the British encountered a formidable opponent in the form of Paul Erich von Lettow-Vorbeck. The 101st took part in the initial landings and the Battle of Tanga, a German victory, that saw the British and Indian forces, including the 101st, sustain significant casualties that compelled them to retreat back to their ships. In January 1915, a company of the 101st took part in the Battle of Jassin that saw both sides sustain heavy casualties which compelled von Lettow-Vorbeck to avoid pitched battles with the British forces. Due to this defeat, the British garrison in Jassin surrendered, after no relief force had arrived, with nearly 300 British and Indians troops taken prisoner, including the company of the 101st, but were subsequently released on parole with the pledge that they would have no further participation in the war.