Complex sentence: The Lebanese Special Forces are the elite of the Lebanese army, those who enroll are subjected to rigorous training regimes and must be in peak physical and mental condition prior to their ascension to such a highly desired position.
Split into simpler sentences: The Lebanese Special Forces are the elite of the Lebanese Army. Those who enrol are subjected to rigorous training regimes and must be in peak physical and mental condition prior to their ascension to such a highly desired position.