Complex sentence: He eventually kills Argurios with a bow and arrow but when their attack fails King Priam allows the forces of the Mykene to return home as long as they make sure Kolanos does not.
Split into simpler sentences: He eventually kills Argurios with a bow and arrow. When their attack fails, King Priam allows the forces of the Mykene to return home-as long as they make sure Kolanos does not.