On 28 September 1918, Lettow-Vorbeck again crossed the Ruvuma River and returned to German East Africa, with the British still in pursuit. He then turned west and raided Northern Rhodesia, evading an ambush that the British had prepared in German East Africa. On 13 November 1918, two days after the Armistice, he took the town of Kasama, which the British had evacuated, and continued heading south-west towards Katanga. When he reached the Chambeshi River on the morning of 14 November, the British magistrate Hector Croad appeared under a white flag and delivered a message from South African General Jacob van Deventer, informing Lettow-Vorbeck of the Armistice. Lettow-Vorbeck agreed to a cease-fire at the spot now marked by the Chambeshi Monument in present-day Zambia. He was instructed by the British to march north to Abercorn to surrender his army, arriving there on 25 November. The remains of his army at the time consisted of 30 German officers, 125 German non-commissioned officers and other enlisted ranks, 1,168 Askaris, and some 3,500 porters.