Simplify the following text for a Grade 5 native English-speaking person.
Original: In 480 , Aeschylus was called into military service again , this time against Xerxes ' invading forces at the Battle of Salamis , and perhaps , too , at the Battle of Plataea in 479 .
Simplified: In 480 BC , Xerxes I of Persia , tried to capture Greece . Aeschylus fought against them at the Battle of Salamis and at the Battle of Plataea in 479 BC .