In its 1937 invasion of China, Japan employed some 50,000 bicycle troops. Early in World War II their southern campaign through Malaya en route to capturing Singapore in 1941 was largely dependent on bicycle-riding soldiers. In both efforts bicycles allowed quiet and flexible transport of thousands of troops who were then able to surprise and confuse the defenders. Bicycles also made few demands on the Japanese war machine, needing neither trucks, nor ships to transport them, nor precious petroleum. Although the Japanese were under orders not to embark for Malaya with bicycles, for fear of slowing up amphibious landings, they knew from intelligence that bicycles were plentiful in Malaya and moved to systematically confiscate bicycles from civilians and retailers as soon as they landed. Using bicycles, the Japanese troops were able to move faster than the withdrawing Allied Forces, often successfully cutting off their retreat. The speed of Japanese advance, usually along plantation roads, native paths and over improvised bridges, also caught Allied Forces defending the main roads and river crossings by surprise, by attacking them from the rear. However there were one or two cases of Australian troops turning the tables on the Japanese by isolating cycle troops from their accompanying motorized forces after blowing up bridges over rivers.