<Tr> <Th> 1933 </Th> <Td> </Td> <Td> 0 </Td> <Td> 122.1 </Td> <Td> − 122.1 </Td> <Th> 1956 </Th> <Td> </Td> <Td> 508.3 </Td> <Td> 0 </Td> <Td> 508.3 </Td> </Tr> <Tr> <Th> 1934 </Th> <Td> </Td> <Td> 278.1 </Td> <Td> 0 </Td> <Td> 278.1 </Td> <Th> 1968 </Th> <Td> </Td> <Td> 0 </Td> <Td> 154.6 </Td> <Td> − 154.6 </Td> </Tr> <Tr> <Th> 1939 </Th> <Td> </Td> <Td> 240.2 </Td> <Td> 0 </Td> <Td> 240.2 </Td> <Th> 1970 </Th> <Td> 21 </Td> <Td> 449.8 </Td> <Td> 1,881.8 </Td> <Td> − 1,432 </Td> </Tr> <Tr> <Th> 1940 </Th> <Td> </Td> <Td> 0 </Td> <Td> 209.5 </Td> <Td> − 209.5 </Td> <Th> 1976 </Th> <Td> 6 </Td> <Td> 49.2 </Td> <Td> 0 </Td> <Td> 49.2 </Td> </Tr>

In what ways did the united states acquire western lands