Battles & Wars › World War II › Arsenal of Democracy: US war production
Lend-Lease
Act signed March 11, 1941; ~$50 billion in aid· Arms maker, factory or program· Arms makers & war industry
Well documentedSolid records, physical evidence or scientific consensus.
The US program that supplied Britain, the Soviet Union, China and other Allies with weapons, food and fuel, mostly without payment.
See it on the Battles & Wars map →What happened
By late 1940 Britain was running out of dollars to buy American arms. Roosevelt compared aid to lending a garden hose to a neighbor whose house was on fire. The Lend-Lease Act of March 11, 1941, let the president lend or lease war goods to any country vital to US defense. About $50 billion went out, roughly $31 billion to the British Empire and $11 billion to the USSR: aircraft, tanks, trucks, locomotives, food and fuel. Most was never repaid.
Why it matters
It made the US the Allies' supplier before it entered the war, and its trucks, rail equipment and food kept Soviet armies moving in 1943–45.
How we know
The Act itself, US Treasury and aid-agency accounts, and British and Soviet receipts. Khrushchev's memoirs quote Stalin privately admitting the USSR could not have coped alone.
Still debated
How much it mattered to Soviet victory is debated: Soviet histories put it at about 4% of Soviet output, while Western historians stress its trucks, food and explosives.
Connections (3)
▸Lend-Lease answered the 'give us the tools' plea of Winston ChurchillWell documented
The connection
In a February 9, 1941 broadcast aimed partly at American listeners, Churchill said: 'Give us the tools, and we will finish the job.' Britain had nearly exhausted its dollar reserves buying US arms for cash. The Lend-Lease Act passed a month later; Britain and its empire received about $31 billion, the largest share.
When and how
London radio broadcast, February 9, 1941; Lend-Lease Act signed March 11, 1941.
How we know
Churchill's broadcast text, British Treasury records of the dollar crisis, and US aid accounts.
Debates and open questions
Historians differ on how generous the terms were: US conditions on bases and postwar trade also served American interests and weakened Britain's position.
▸Lend-Lease sent about $11 billion in aid to Joseph StalinWell documented
The connection
From late 1941 the US sent the USSR about $11 billion in goods: roughly 400,000 trucks and jeeps, about 2,000 locomotives, aircraft, tanks, food, explosives and aviation fuel. It traveled on Arctic convoys to Murmansk, through Iran, and across the Pacific to Vladivostok. American trucks carried much of the Red Army's later advance.
When and how
Arctic, Persian Gulf and Pacific routes, October 1941 – 1945; Stalin's government and US aid officials such as Harry Hopkins.
How we know
US shipping records and Soviet receipts; at Tehran in 1943 Stalin toasted American production as vital to victory.
Debates and open questions
Stalin's real view is unclear: he praised the aid in private and at Tehran, but Soviet histories later played it down.
▸Liberty ships carried much of the cargo of Lend-LeaseWell documented
The connection
Lend-Lease goods had to cross oceans, and most went by merchant ship. Liberty ships carried tanks, trucks, food and ammunition to Britain, to Murmansk on the Arctic convoys, and to Iran's ports for the overland route to the USSR. About 180 were lent to Britain, which gave them names beginning 'Sam'.
When and how
Atlantic, Arctic and Persian Gulf routes, 1942–45; the US Maritime Commission and War Shipping Administration.
How we know
War Shipping Administration cargo records and convoy lists document the ships and what they carried.
Debates and open questions
Losses are counted differently across sources; Arctic convoy PQ 17 alone lost 24 of its 35 merchant ships in July 1942.