<Tr> <Td> Ludlow Amendment </Td> </Tr> <Tr> <Th> 1970 Vietnam </Th> </Tr> <Tr> <Td> McGovern--Hatfield Amendment </Td> </Tr> <Tr> <Th> 1970 Southeast Asia </Th> </Tr>

The neutrality act of 1939 allowed nations at war