Robertson built up what became the British Commonwealth Forces Korea (BCFK). While the British government had hoped to have the Americans supply all their logistic support, Robertson realised that this was impossible. The US Army was being stretched to its limit just supporting itself and the army of the Republic of Korea, and British Commonwealth equipment was different in many respects. The British Army then scrambled to meet its own logistic needs, creating ad hoc arrangements and requesting support from Robertson and MacArthur. The Chief of the General Staff, Sydney Rowell, sent a cable to his British counterpart, Field Marshal Sir William Slim, warning of "a bugger's muddle in which the only people to suffer will be the soldiers". Slim agreed; a Maintenance Area was established in Korea to support Commonwealth forces there, which drew some resources from American sources, such as petrol, oil and lubricants, engineer stores, casualty evacuation and port operations, and the rest from BCOF in Japan.