<Table> <Tr> <Th_colspan="2"> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> Arab--Byzantine wars </Th> </Tr> <Tr> <Td_colspan="2"> Early conflicts <Ul> <Li> Mu'tah </Li> <Li> Dathin </Li> <Li> Firaz </Li> </Ul> <P> Muslim conquest of the Levant </P> <Ul> <Li> al - Qaryatayn </Li> <Li> Bosra </Li> <Li> Ajnadayn </Li> <Li> Marj Rahit </Li> <Li> Fahl </Li> <Li> Damascus </Li> <Li> Maraj - al - Debaj </Li> <Li> Emesa </Li> <Li> Yarmouk </Li> <Li> Jerusalem </Li> <Li> Hazir </Li> <Li> Aleppo </Li> <Li> Iron Bridge </Li> <Li> Germanicia </Li> </Ul> <P> Muslim conquest of Egypt </P> <Ul> <Li> Heliopolis </Li> <Li> Babylon Fortress </Li> <Li> Alexandria </Li> <Li> Nikiou </Li> </Ul> <P> Muslim conquest of North Africa </P> <Ul> <Li> Sufetula </Li> <Li> Vescera </Li> <Li> Mamma </Li> <Li> Carthage </Li> </Ul> <P> Umayyad invasions of Anatolia and Constantinople </P> <Ul> <Li> 1st Constantinople </Li> <Li> Sebastopolis </Li> <Li> Tyana </Li> <Li> 2nd Constantinople </Li> <Li> Nicaea </Li> <Li> Akroinon </Li> </Ul> <P> Arab--Byzantine border warfare </P> <Ul> <Li> Kamacha </Li> <Li> Abbasid invasion of 782 </Li> <Li> Kopidnadon </Li> <Li> Krasos </Li> <Li> Abbasid invasion of 806 </Li> <Li> Anzen and Amorium </Li> <Li> Mauropotamos </Li> <Li> Faruriyyah </Li> <Li> Lalakaon </Li> <Li> Bathys Ryax </Li> </Ul> <P> Sicily and Southern Italy </P> <Ul> <Li> 1st Syracuse </Li> <Li> 2nd Syracuse </Li> <Li> 1st Malta </Li> <Li> 3rd Syracuse </Li> <Li> Caltavuturo </Li> <Li> Campaigns of Leo Apostyppes and Nikephoros Phokas the Elder </Li> <Li> Stelai (1st Milazzo) </Li> <Li> (2nd) Milazzo </Li> <Li> 1st Taormina </Li> <Li> Garigliano </Li> <Li> Campaigns of Marianos Argyros </Li> <Li> 2nd Taormina </Li> <Li> Rometta </Li> <Li> Straits of Messina </Li> <Li> George Maniakes in Sicily </Li> <Li> 2nd Malta </Li> </Ul> <P> Naval warfare and raids </P> <Ul> <Li> Phoenix </Li> <Li> Keramaia </Li> <Li> Muslim conquest of Crete </Li> <Li> Thasos </Li> <Li> Damietta </Li> <Li> Ragusa </Li> <Li> Kardia </Li> <Li> Gulf of Corinth </Li> <Li> Cephalonia </Li> <Li> Euripos </Li> <Li> Thessalonica </Li> </Ul> <P> Byzantine Reconquest </P> <Ul> <Li> Campaigns of John Kourkouas </Li> <Li> Campaigns of Sayf al - Dawla <Ul> <Li> Marash </Li> <Li> Raban </Li> <Li> Andrassos </Li> </Ul> </Li> <Li> Campaigns of Nikephoros Phokas <Ul> <Li> Crete </Li> <Li> Cilicia </Li> <Li> Antioch </Li> </Ul> </Li> <Li> Alexandretta </Li> <Li> Campaigns of John Tzimiskes <Ul> <Li> Syria </Li> </Ul> </Li> <Li> Orontes </Li> <Li> Apamea </Li> <Li> Campaigns of Basil II </Li> <Li> Azaz </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> Arab--Byzantine wars </Th> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <Tr> <Td_colspan="2"> Early conflicts <Ul> <Li> Mu'tah </Li> <Li> Dathin </Li> <Li> Firaz </Li> </Ul> <P> Muslim conquest of the Levant </P> <Ul> <Li> al - Qaryatayn </Li> <Li> Bosra </Li> <Li> Ajnadayn </Li> <Li> Marj Rahit </Li> <Li> Fahl </Li> <Li> Damascus </Li> <Li> Maraj - al - Debaj </Li> <Li> Emesa </Li> <Li> Yarmouk </Li> <Li> Jerusalem </Li> <Li> Hazir </Li> <Li> Aleppo </Li> <Li> Iron Bridge </Li> <Li> Germanicia </Li> </Ul> <P> Muslim conquest of Egypt </P> <Ul> <Li> Heliopolis </Li> <Li> Babylon Fortress </Li> <Li> Alexandria </Li> <Li> Nikiou </Li> </Ul> <P> Muslim conquest of North Africa </P> <Ul> <Li> Sufetula </Li> <Li> Vescera </Li> <Li> Mamma </Li> <Li> Carthage </Li> </Ul> <P> Umayyad invasions of Anatolia and Constantinople </P> <Ul> <Li> 1st Constantinople </Li> <Li> Sebastopolis </Li> <Li> Tyana </Li> <Li> 2nd Constantinople </Li> <Li> Nicaea </Li> <Li> Akroinon </Li> </Ul> <P> Arab--Byzantine border warfare </P> <Ul> <Li> Kamacha </Li> <Li> Abbasid invasion of 782 </Li> <Li> Kopidnadon </Li> <Li> Krasos </Li> <Li> Abbasid invasion of 806 </Li> <Li> Anzen and Amorium </Li> <Li> Mauropotamos </Li> <Li> Faruriyyah </Li> <Li> Lalakaon </Li> <Li> Bathys Ryax </Li> </Ul> <P> Sicily and Southern Italy </P> <Ul> <Li> 1st Syracuse </Li> <Li> 2nd Syracuse </Li> <Li> 1st Malta </Li> <Li> 3rd Syracuse </Li> <Li> Caltavuturo </Li> <Li> Campaigns of Leo Apostyppes and Nikephoros Phokas the Elder </Li> <Li> Stelai (1st Milazzo) </Li> <Li> (2nd) Milazzo </Li> <Li> 1st Taormina </Li> <Li> Garigliano </Li> <Li> Campaigns of Marianos Argyros </Li> <Li> 2nd Taormina </Li> <Li> Rometta </Li> <Li> Straits of Messina </Li> <Li> George Maniakes in Sicily </Li> <Li> 2nd Malta </Li> </Ul> <P> Naval warfare and raids </P> <Ul> <Li> Phoenix </Li> <Li> Keramaia </Li> <Li> Muslim conquest of Crete </Li> <Li> Thasos </Li> <Li> Damietta </Li> <Li> Ragusa </Li> <Li> Kardia </Li> <Li> Gulf of Corinth </Li> <Li> Cephalonia </Li> <Li> Euripos </Li> <Li> Thessalonica </Li> </Ul> <P> Byzantine Reconquest </P> <Ul> <Li> Campaigns of John Kourkouas </Li> <Li> Campaigns of Sayf al - Dawla <Ul> <Li> Marash </Li> <Li> Raban </Li> <Li> Andrassos </Li> </Ul> </Li> <Li> Campaigns of Nikephoros Phokas <Ul> <Li> Crete </Li> <Li> Cilicia </Li> <Li> Antioch </Li> </Ul> </Li> <Li> Alexandretta </Li> <Li> Campaigns of John Tzimiskes <Ul> <Li> Syria </Li> </Ul> </Li> <Li> Orontes </Li> <Li> Apamea </Li> <Li> Campaigns of Basil II </Li> <Li> Azaz </Li> </Ul> </Td> </Tr>

Highlight the contribution of the third caliph of islam