<Tr> <Td> Late Bronze Age collapse </Td> <Td> </Td> <Td> </Td> <Td> Egypt, Anatolia, Syria, Canaan, Cyprus, Greece, Mesopotamia </Td> <Td> 1200s BCE </Td> <Td> 1150s BCE </Td> <Td> 40 - 50 </Td> </Tr> <Tr> <Td> Greco - Persian Wars </Td> <Td> </Td> <Td> </Td> <Td> Greece, Thrace, Aegean Islands, Asia Minor, Cyprus, Egypt </Td> <Td> 499 BCE </Td> <Td> 449 BCE </Td> <Td> 50 </Td> </Tr> <Tr> <Td> Peloponnesian War </Td> <Td> </Td> <Td> </Td> <Td> Greece, Asia Minor, Sicily </Td> <Td> 431 BCE </Td> <Td> 404 BCE </Td> <Td> 27 </Td> </Tr> <Tr> <Td> Wars of Alexander the Great </Td> <Td> </Td> <Td> </Td> <Td> Thrace, Illyria, Greece, Asia Minor, Syria, Babylonia, Persia, Sogdiana, India </Td> <Td> 335 BCE </Td> <Td> 323 BCE </Td> <Td> 12 </Td> </Tr>

How many countries were involved in ww1 and ww2