<Tr> <Th_colspan="2"> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> Theatres of World War I </Th> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <Tr> <Td_colspan="2"> <Dl> <Dt> European </Dt> </Dl> <Ul> <Li> Western Front </Li> <Li> Eastern Front </Li> <Li> Italian Front </Li> <Li> Balkans </Li> </Ul> <Dl> <Dt> Middle Eastern </Dt> </Dl> <Ul> <Li> Caucasus </Li> <Li> Persia </Li> <Li> Gallipoli </Li> <Li> Mesopotamia </Li> <Li> Sinai and Palestine </Li> <Li> Arab Revolt </Li> <Li> South Arabia </Li> </Ul> <Dl> <Dt> African </Dt> </Dl> <Ul> <Li> South - West Africa </Li> <Li> Togoland </Li> <Li> Cameroon </Li> <Li> East Africa </Li> <Li> North Africa </Li> </Ul> <Dl> <Dt> Asian and Pacific theatre </Dt> </Dl> <Dl> <Dt> Naval theaters </Dt> </Dl> <Ul> <Li> U-boat </Li> <Li> Atlantic Ocean </Li> <Li> Mediterranean </Li> </Ul> </Td> </Tr> <Dl> <Dt> European </Dt> </Dl>

The arrival of which ally stopped the advance of the german army in world war i