<P> U.S. shipping interests were forbidden from entering into conflict zones and US passengers traveling on foreign ships did so at their own risk . </P> <P> The "cash and carry" legislation enacted in 1939 effectively ended the arms embargo that had been in place since the Neutrality Act of 1936 . It paved the way for Lend - Lease . </P>

Cash and carry provision of the 1937 neutrality act stated that