Original sentence: That the Battle of Yarmouk is one of the most decisive battles in military history, has been claimed, and it was followed by a number of Islamic conquests after the death of Muhammad, heralding the rapid advance of Islam into the then Christian Levant
Edited sentence: That the Battle of Yarmouk is one of the most decisive battles in military history, has been claimed, and it marked the first great wave of Islamic conquests after the death of Muhammad, heralding the rapid advance of Islam into the then Christian Levant