<Tr> <Td> October 6 </Td> <Td> Peru </Td> <Td> Germany </Td> </Tr> <Tr> <Td> October 7 </Td> <Td> Uruguay </Td> <Td> Germany </Td> </Tr> <Tr> <Td> October 26 </Td> <Td> Brazil </Td> <Td> Germany </Td> </Tr> <Tr> <Td> December 7 </Td> <Td> United States </Td> <Td> Austria - Hungary </Td> </Tr>

What were the names of the two sides fighting in world war i