Simplify the following text for a Grade 8 native English-speaking person.
Original: Pompey 's two sons , the most important of whom was Sextus Pompeius , and the Pompeian faction , led now by Labienus , survived and fought for their cause in the name of Pompey the Great .
Simplified: Pompey 's two sons and the Pompeian faction led now by Labienus , survived and fought their cause in the name of Pompey the Great .