"Yet the Americans did more than just equip themselves for total war. They also equipped their Allies. It is well known that the system of Lend-Lease provided a vital multi-billion pound economic lifeline to Britain. Net grants from the United States totalled £5.4 billion between 1941 and 1945, on average around 9 per cent of UK gross national product. Less well known are the vast quantities of material that the Americans made available to the Soviets. All told, Stalin received supplies worth 93 billion roubles, between 4 and 8 per cent of Soviet net material product. The volumes of hardware suggest that these official statistics understate the importance of American assistance: 380,000 field telephones, 363,000 trucks, 43,000 jeeps, 6,000 tanks and over 5,000 miles of telephone wire were shipped along the icy Arctic supply routes to Murmansk, from California to Vladivostok, or overland from Persia. Thousands of fighter planes were flown along an 'air bridge' from Alaska to Siberia. Nor was it only hardware that the Americans supplied to Stalin. Around 58 per cent of Soviet aviation fuel came from the United States during the war, 53 per cent of all explosives and very nearly half of all the copper, aluminium and tyres, to say nothing of the tons of tinned Spam - in all, somewhere between 41 and 63 per cent of all Soviet military supplies. American engineers also continued to provide valuable technical assistance, as they had in the early days of Magnitogorsk. The letters 'USA' stencilled on the Studebaker trucks were said to stand for Ubit Sukina sina Adolf - 'to kill that son-of-a-bitch Adolf.' The Soviets would have struggled to kill half so many Germans without this colossal volume of aid."