<Tr> <Th> Date </Th> <Th> Event </Th> <Th> Change Map </Th> </Tr> <Tr> <Th> December 20, 1860 </Th> <Td> In response to the election of Abraham Lincoln, South Carolina proclaimed its secession from the Union, withdrawing from the Congress of the United States . </Td> <Td> Disputes: </Td> </Tr> <Tr> <Th> January 9, 1861 </Th> <Td> Mississippi proclaimed its secession from the Union, withdrawing from Congress . </Td> <Td> Disputes: </Td> </Tr> <Tr> <Th> January 10, 1861 </Th> <Td> Florida proclaimed its secession from the Union, withdrawing from Congress . </Td> <Td> Disputes: </Td> </Tr>

What was the growth of the united states to the pacific ocean called