Simplify the following text for a Grade 8 native English-speaking person.
Original: As the Greeks seem to be on the verge of defeat , Achilles appears with the Myrmidons and joins the battle , eventually fighting against Hector .
Simplified: As the Greeks are close to loosing , Achilles comes with the Myrmidons , and joins the fight . Achilles fights Hector and Hector is killed .