<Tr> <Th> September 28, 1776 </Th> <Td> The State of Pennsylvania enacted a constitution, renaming itself the Commonwealth of Pennsylvania . </Td> <Td> no change to map </Td> </Tr> <Tr> <Th> December 20, 1776 </Th> <Td> To avoid British forces who were advancing on Philadelphia, the Continental Congress began meeting in Baltimore . </Td> <Td> </Td> </Tr> <Tr> <Th> January 15, 1777 </Th> <Td> The northeastern region of New York, known as the New Hampshire Grants, declared independence as New Connecticut . </Td> <Td> Disputes: <P> </P> </Td> </Tr> <Tr> <Th> March 4, 1777 </Th> <Td> The Continental Congress returned to Philadelphia after the threat to it by British forces was ended . </Td> <Td> </Td> </Tr>

Expansion of the united states of america map