<Table> <Tr> <Td> "</Td> <Td> Without American production, the United Nations could never have won the war . </Td> <Td>" </Td> </Tr> </Table> <Tr> <Td> "</Td> <Td> Without American production, the United Nations could never have won the war . </Td> <Td>" </Td> </Tr> <P> The year 1940 marked a change in attitude in the United States . The German victories in France, Poland and elsewhere, combined with the Battle of Britain, led many Americans to believe that the United States would be forced to fight soon . In March 1941, the Lend - Lease program began shipping money, munitions, and food to Britain, China, and (by that fall) the Soviet Union . </P> <P> By 1941 the United States was taking an active part in the war, despite its nominal neutrality . In spring U-boats began their "wolf - pack" tactics which threatened to sever the trans - Atlantic supply line; Roosevelt extended the Pan-American Security Zone east almost as far as Iceland . The US Navy's "neutrality patrols" were anything but, as in practice their function was to report Axis ship and submarine sightings to the British and Canadian navies, and from April the US Navy began escorting Allied convoys from Canada as far as the "Mid-Atlantic Meeting Point" (MOMP) south of Iceland, where they handed off to the RN . </P>

What president brought us into world war 2