Louisiana Purchase money and invasion finance

The old combined-fleet invasion idea drew on money raised through the Louisiana Purchase. American buyers relied on loans, including one from a major British bank, so British finance indirectly helped move funds to France. The transaction made diplomatic sense as a way to improve relations with the United States, but its military consequence only became clear afterward. Britain then tried unsuccessfully to intercept the money on its way to France. Ordinary finance had produced a striking wartime contradiction without requiring a conspiracy.