Lend-Lease reversed the First World War model of fixed loans, which had produced enduring postwar disputes. Removing price negotiations let the Allies choose the contribution with the greatest military value without reopening payment for every transfer. It also allowed each economy to specialise in what it produced best. British licences and technical research moved to the United States without dollar payment, while Fleet Air Arm Hellcats came from American production Britain could no longer buy for cash. Those examples show why knowledge and access to production could matter as much as finished aircraft, ships, or vehicles.
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Lend-Lease as a strategic transaction
The programme removed currency barriers from Allied decisions and exchanged British technology for access to American production, including Fleet Air Arm Hellcats.